Updated openstack/openstack
Project: openstack/keystone  b5a26b35ac9f05d24d77440f5a5f75d4bf31e69c
null
Move _BaseController to common/controllers.py

The _BaseController class from the Federation work offered
some nice functionality for ensuring the controller checks for required
arguments in resource CRUD. Moving this to controller.V3Controller so
that it can be used consistently on resources in the Identity V3 API.

Related-Bug: 1278739
Change-Id: Icb66e2e324820959fa9409a3b1388c89b82f8ec0