common: Remove references to pkg_resources

Even though the comment here attributed this to stevedore, it was in
fact the use of pkg_resources that changed things.

Change-Id: I35377dd7d773024aa6423b72b1412e11b1b6f2e4
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

Author: stephenfin

openstackclient/common/clientmanager.py

@@ -158,16 +158,7 @@ def get_plugin_modules(group):
     for ep in mgr:
         LOG.debug('Found plugin %s', ep.name)
 
-        # Different versions of stevedore use different
-        # implementations of EntryPoint from other libraries, which
-        # are not API-compatible.
-        try:
-            module_name = ep.entry_point.module_name
-        except AttributeError:
-            try:
-                module_name = ep.entry_point.module
-            except AttributeError:
-                module_name = ep.entry_point.value
+        module_name = ep.entry_point.module
 
         try:
             module = importlib.import_module(module_name)

openstackclient/shell.py

@@ -74,10 +74,7 @@ def _final_defaults(self):
             self._auth_type = 'password'
 
     def _load_plugins(self):
-        """Load plugins via stevedore
-
-        osc-lib has no opinion on what plugins should be loaded
-        """
+        """Load plugins via stevedore."""
         # Loop through extensions to get API versions
         for mod in clientmanager.PLUGIN_MODULES:
             default_version = getattr(mod, 'DEFAULT_API_VERSION', None)