Updated openstack/openstack
Project: openstack/tempest  e46a75dc4262f065de79b5bd4215b87fde8797a6
null
orchestration API add coverage for stack update API

Currently we have no coverage of the stack update API, although there
is a function for it in orchestration_client.  So add a simple test of
the stack update API surface.

Change-Id: I46dba8e4d7d5c4e30d341b6269897386ce9bf378