Miscellaneous pylint fixes.

The following rules are no longer disabled:

- bad-format-string
- duplicate-key
- lost-exception
- trailing-newlines
- unexpected-keyword-arg
- useless-suppression
- using-constant-test

lib/ansible/plugins/action/__init__.py

@@ -532,7 +532,7 @@ class ActionBase(with_metaclass(ABCMeta, object)):
             elif 'json' in errormsg or 'simplejson' in errormsg:
                 x = "5"  # json or simplejson modules needed
         finally:
-            return x
+            return x  # pylint: disable=lost-exception
 
     def _remote_expand_user(self, path, sudoable=True):
         ''' takes a remote path and performs tilde expansion on the remote host '''