Add generating parameters for openstack-actions

 * Fixed Action model to keep more data in input field
 * Fixed ActionGenerator to return list of action dictionaries instead of dict
 * Removed all wrong action methods in mapping.json
 * Fixed keystone group in mapping.json (oauth1)
 * Generator now uses fake python client to retrieve client method for
   making description and parameters
 * Fixed inspect_utils

Change-Id: Ib9b5ff6ea32296058d09180f5766c7afff1a3f4f
Merge "Add generating parameters for openstack-actions"