Updated openstack/openstack
Project: openstack/neutron  0889ff15f286e736c4ddcf267200c3a66886b29a

Fix context.elevated

The current version of elevated method sets for the original context
the admin role too. This change fix this.

Added unittest.

Closes-bug: #1386932

Change-Id: Ife881112efa151e53bfa4b7af35643dcf2d1114f