Updated openstack/openstack
Project: openstack/tempest  4b53c89b270be70efa5478bd94e71bb3c5565926

Move tempest to oslo-config-generator

Also fixes tempest reported bug with old generator in oslo-incubator,
when identical options are registered in different groups.

Change-Id: I274f48503c1b61ca09cabc8d8c50245ba1059943
Closes-bug: 1282887