Issue #2, Issue #5: Migrate doc_fragments, fix missing types in docs.

plugins/module_utils/common.py

@@ -16,6 +16,7 @@
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
 from __future__ import absolute_import, division, print_function
+__metaclass__ = type
 
 import copy
 import json
@@ -122,7 +123,9 @@ AUTH_ARG_SPEC = {
         'type': 'path',
         'aliases': ['key_file'],
     },
-    'proxy': {},
+    'proxy': {
+        'type': 'str',
+    },
 }
 
 # Map kubernetes-client parameters to ansible parameters