[sonic-slave-stretch]: use pip to install nose package directly (soni…

…c-net#7257)

Fix sonic-net#7248

Issue is similiar to martinblech/xmltodict#47

The correct solution is to change mockredispy to move
nose from setup_requirement to test_requirement.

The quick workaround is to install nose explicitly.

fix build issue:

05:09:37    Downloading mockredispy-2.9.3.tar.gz (17 kB)
05:09:39  ?[91m    ERROR: Command errored out with exit status 1:
05:09:39       command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-sypos2ry/mockredispy_ab86cd14995544df90f78a63ab7041a3/setup.py'"'"'; __file__='"'"'/tmp/pip-install-sypos2ry/mockredispy_ab86cd14995544df90f78a63ab7041a3/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-ymhn19ne
05:09:39           cwd: /tmp/pip-install-sypos2ry/mockredispy_ab86cd14995544df90f78a63ab7041a3/
05:09:39      Complete output (23 lines):
05:09:39      Couldn't find index page for 'nose' (maybe misspelled?)
05:09:39      No local packages or working download links found for nose
05:09:39      Traceback (most recent call last):
05:09:39        File "<string>", line 1, in <module>
05:09:39        File "/tmp/pip-install-sypos2ry/mockredispy_ab86cd14995544df90f78a63ab7041a3/setup.py", line 29, in <module>
05:09:39          'with_redis = mockredis.noseplugin:WithRedis'
05:09:39        File "/usr/lib/python3.5/distutils/core.py", line 108, in setup
05:09:39          _setup_distribution = dist = klass(attrs)
05:09:39        File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 317, in __init__
05:09:39          self.fetch_build_eggs(attrs['setup_requires'])
05:09:39        File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 372, in fetch_build_eggs
05:09:39          replace_conflicting=True,
05:09:39        File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 846, in resolve
05:09:39          dist = best[req.key] = env.best_match(req, ws, installer)
05:09:39        File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1118, in best_match
05:09:39          return self.obtain(req, installer)
05:09:39        File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1130, in obtain
05:09:39          return installer(requirement)
05:09:39        File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 440, in fetch_build_egg
05:09:39          return cmd.easy_install(req)
05:09:39        File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 693, in easy_install
05:09:39          raise DistutilsError(msg)
05:09:39      distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('nose')
05:09:39      ----------------------------------------

Signed-off-by: Guohan Lu <lguohan@gmail.com>

sonic-slave-stretch/Dockerfile.j2

@@ -366,6 +366,7 @@ RUN pip install meld3 mock
 RUN pip install pexpect==4.6.0
 
 # For sonic-utilities build
+RUN pip install nose==1.3.7
 RUN pip install mockredispy==2.9.3
 RUN pip install pytest-runner==4.4
 RUN pip install setuptools==40.8.0