Updated openstack/openstack
Project: openstack-dev/devstack  8a88f2728c9aaddf607325c4307652df86928aa9

Add keystone middleware to devstack

Add the keystonemiddleware repository to devstack to support testing
with tempest and stable branches.

Change-Id: Ib635465e6568d9cd51d6e432ec8b8633a27d19ce