Updated openstack/openstack
Project: openstack/tempest  49921c5d617224c22c71b779cf42917068a04b4c

enable cinder v2 api for test_multi_backend

    volume_type_client for v2 is added.

Partially implements: blueprint cinder-v2-api-tests

Change-Id: I0729eaf30946bd291f2fdaee8e99bf125e47be83