Updated openstack/openstack
Project: openstack/sahara  053b2824d3c98805b9d508ecad6ab793309d07c6

Adding configuration and check for proxy domain

Changes
* adding configuration option for use of proxy domain
* adding configuration option for proxy domain name
* adding method to get the Domain object for the proxy

Partial-implements: blueprint edp-swift-trust-authentication
Change-Id: I369de80c918a52db5200865f754c40bc807289e4