take info about the username and vhost from enviroment['queue']

Change-Id: Ifb3be06698e70eeade9a32f06dfa64327461267d
Merge "take info about the username and vhost from enviroment['queue']"
Changed #config_by_role keystone handling

Identity attributes are no longer at the top level of
the node.  Need to properly access the new attributes.
Tests needed to be adjusted so that they would pass.

Change-Id: I0a697c217364a26ae97cf31d37a32e97f11c2e85