Updated openstack/openstack
Project: openstack/heat  089f7f0b9d055e445f8ad4efd28ff78c9bd796f2

Account for differences in Rackspace Cloud Glance

The Rackspace Cloud service catalog has a tenant-scoped URL
for the image service so our client implementation needs to
munge the URL a little to make it work.

Change-Id: Ic5b3702aec8c4ab373dbcf6eb8e6f164d9fd48d0