Updated openstack/openstack
Project: openstack/heat  f43cd27cda3ee22a166dd3a5416b278c3126137a

Implement glance client plugin

This moves the client creation code out of Clients._glance() into
its own client plugin.

Glance is a core project, and python-glanceclient is a dependency,
so the import is now mandatory.

Change-Id: If61f2510344bf67b7e9aded1dc9d9cedf2426228