Fix a bug in trust middleware
Fix a bug in trust middleware

Credential should be used as key word arguments rather than a single
dictionary when invoking get_user_id method of KeystoneClient. This
patch fixes an error in trust middleware.

Change-Id: Iead148e62680c24ac6cc217052c38120cb1ca4da

stackforge/senlin,Alzon/senlin,stackforge/senlin,tengqm/senlin-container,openstack/senlin,openstack/senlin,openstack/senlin,tengqm/senlin-container,Alzon/senlin