Add release names to api-ref
Add release names to api-ref

Add the corresponding release cycle name to the API version number to
assist in correlating new API features with releases.

Change-Id: I24bf0d9d654436338e1ffc688278a5a93eb1e219

mahak/keystone,mahak/keystone,mahak/keystone,openstack/keystone,openstack/keystone,openstack/keystone