Updated openstack/openstack
Project: openstack/tempest  1c2a47e7346383ef44e89cd34622d153326eb1e7

Fix service validation schema

In case when nova has 'servicegroup_driver' not 'db'
field 'updated_at' in services response is null.

Change-Id: I03610827b87719b76c043b85f1f9002869eb4a5e
Closes-Bug: 1387983