Updated openstack/openstack
Project: openstack/keystone  1de5124dd58ba59cd6ee370abda8e1e581ace421
null
Adds fixture package from oslo

The mock library is added to test-requirements.txt since the
mockpatch fixture requires it.

Change-Id: I1b5b0c75f256382a685fceb2117db6d5b18d8c4f