I'd like to bring this to your attention since this might affect
packaging in some way.
When change to 12.x version happen, we'll be adding Epoch across the
board but we already had that when openstack clients moved out of
coordinated release, so it's known problem how to handle it:
http://pkgs.fedoraproject.org/cgit/python-keystoneclient.git/tree/python-...
Cheers,
Alan