Add a command to clear the service database

Add a pdo-shell command to clear the service database. When
building the test databases, the default values for some of
the groups persisted.

Signed-off-by: Mic Bowman <mic.bowman@intel.com>

client/bin/pdo-create-service-groups.psh

@@ -25,6 +25,9 @@ fi
 
 echo create groups for ${service_host} in ${group_file}
 
+## Remove any groups previously defined
+service_groups clear
+
 ## -----------------------------------------------------------------
 ## Set the default set of eservices that this file knows
 ## about. There may be more that have been added to the

client/pdo/client/commands/service_groups.py

@@ -28,6 +28,7 @@
     'script_command_load',
     'script_command_save',
     'script_command_list',
+    'script_command_clear',
     'do_service_groups',
     'load_commands',
 ]
@@ -149,13 +150,28 @@ def invoke(cls, state, bindings, **kwargs) :
 
         return True
 
+## -----------------------------------------------------------------
+## -----------------------------------------------------------------
+class script_command_clear(pscript.script_command_base) :
+    name = "clear"
+    help = "Clear all information in the service groups database"
+
+    @classmethod
+    def invoke(cls, state, bindings, **kwargs) :
+        state.set(['Service', 'ProvisioningServiceGroups'], {})
+        state.set(['Service', 'StorageServiceGroups'], {})
+        state.set(['Service', 'EnclaveServiceGroups'], {})
+
+        return True
+
 ## -----------------------------------------------------------------
 ## Create the generic, shell independent version of the aggregate command
 ## -----------------------------------------------------------------
 __subcommands__ = [
     script_command_load,
     script_command_save,
-    script_command_list
+    script_command_list,
+    script_command_clear,
 ]
 do_service_groups = pscript.create_shell_command('service_groups', __subcommands__)