Updated openstack/openstack
Project: openstack/cinder  0ad7847dbde5bee5ec2b46e0c4051b8cae4580dc

Allow backup-to-swift to take swift URL from service catalogue

Since the swift URL is usually in the service catalogue, there is
no need to configure it explicitly.

It can still be set explicitly where manual override is desired.

Change-Id: Ia6c08289b532faed3f6e718d4bbcc1f91978db21