Updated openstack/openstack
Project: openstack/heat  7b91eacc955bd2e9a9f4ae9c69d22dd27dce05e8

Implement sahara client plugin

Sahara is an integrated project, so python-saharaclient is added
to requirements.txt and saharaclient imports are mandatory.
Also sahara client is added to stevedore configuration.

Change-Id: Ide77975026175dd9d638cb4640925bfd3eade40a
Implements: blueprint sahara-as-heat-resource