Add missing python3 in Dockerfile.

[Creatone]

Add missing python interpreter for ipmctl install in dockerfile.

Step 5/21 : RUN git clone -b v02.00.00.3820 https://github.com/intel/ipmctl/ &&     cd ipmctl &&     mkdir output &&     cd output &&     cmake -DRELEASE=ON -DCMAKE_INSTALL_PREFIX=/ -DCMAKE_INSTALL_LIBDIR=/usr/local/lib .. &&     make -j all &&     make 
install                                                                                                                                                                                                                                                       
 ---> Running in 3738cec7fe4f                                                                                                                                                                                                                                 
Cloning into 'ipmctl'...                                                                                                                                                                                                                                      
Note: switching to '24dd2c75c5bcfec587621754a6a3e50639494bb6'.                                                                                                                                                                                                
                                                                                                                                                                                                                                                              
You are in 'detached HEAD' state. You can look around, make experimental                                                                                                                                                                                      
changes and commit them, and you can discard any commits you make in this                                                                                                                                                                                     
state without impacting any branches by switching back to a branch.                                                                                                                                                                                           
                                                                                                                                                                                                                                                              
If you want to create a new branch to retain commits you create, you may                                                                                                                                                                                      
do so (now or later) by using -c with the switch command. Example:                                                                                                                                                                                            
                                                                                                                                                                                                                                                              
  git switch -c <new-branch-name>                                                                                                                                                                                                                             
                                                                                                                                                                                                                                                              
Or undo this operation with:                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                              
  git switch -                                                                                                                                                                                                                                                
                                                                                                                                                                                                                                                              
Turn off this advice by setting config variable advice.detachedHead to false                                                                                                                                                                                  
                                                                                                                                                                                                                                                              
cmake version: 3.17.2                                                                                                                                                                                                                                         
-- The C compiler identification is GNU 9.3.0                                                                                                                                                                                                                 
-- The CXX compiler identification is GNU 9.3.0                                                                                                                                                                                                               
-- Check for working C compiler: /usr/bin/cc                                                                                                                                                                                                                  
-- Check for working C compiler: /usr/bin/cc - works                                                                                                                                                                                                          
-- Detecting C compiler ABI info                                                                                                                                                                                                                              
-- Detecting C compiler ABI info - done                                                                                                                                                                                                                       
-- Detecting C compile features                                                                                                                                                                                                                               
-- Detecting C compile features - done                                                                                                                                                                                                                        
-- Check for working CXX compiler: /usr/bin/c++                                                                                                                                                                                                               
-- Check for working CXX compiler: /usr/bin/c++ - works                                                                                                                                                                                                       
-- Detecting CXX compiler ABI info                                                                                                                                                                                                                            
-- Detecting CXX compiler ABI info - done                                                                                                                                                                                                                     
-- Detecting CXX compile features                                                                                                                                                                                                                             
-- Detecting CXX compile features - done                                                                                                                                                                                                                      
-- Found Git: /usr/bin/git (found version "2.26.3")                                                                                                                                                                                                           
VERSION:02.00.00.3820                                                                                                                                                                                                                                         
BUILD_TYPE:Release                                                                                                                                                                                                                                            
-- Looking for pthread.h                                                                                                                                                                                                                                      
-- Looking for pthread.h - found                                                                                                                                                                                                                              
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD                                                                                                                                                                                                                    
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success                                                                                                                                                                                                          
-- Found Threads: TRUE                                                                                                                                                                                                                                        
-- Found PkgConfig: /usr/bin/pkg-config (found version "1.7.2")                                                                                                                                                                                               
CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:164 (message):                                                                                                                                                                    
  Could NOT find PythonInterp (missing: PYTHON_EXECUTABLE)                                                                                                                                                                                                    
Call Stack (most recent call first):
  /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:445 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake/Modules/FindPythonInterp.cmake:169 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  CMakeLists.txt:86 (find_package)

Signed-off-by: Paweł Szulik pawel.szulik@intel.com

[Creatone]

/ok-to-test