Updated openstack/openstack
Project: openstack/keystone  3397854d73b00256eb28b672ecb4d0d525b1ed22

Fix region schema comment

The comment was inaccurate because it wasn't clear that the ID
could be specified on both POST and PUT.

Change-Id: Ie5e1968f6e85f98e77c5db12e7b3e6b4e8d2938a