Updated openstack/openstack
Project: openstack/keystone  a122624c9d0636a9ead3a1dbbdce893ca92396d1
null
Remove _delete_tokens function from federation controller

There was a TODO to delete tokens based on idps and mappings, but
since this will be done at the middleware level of keystoneclient
(bug 1291157 then there is no include this piece of code.

Change-Id: I0e198c2b7a05e283409aef25e1d7ab93247814fe