Remove our own copy of Trust implementation
Remove our own copy of Trust implementation

Since trust mechinanism is already merged into SDK, there is no need to
maintain our own implementation. The trust module is dead code now.

Change-Id: I6f2b8e811254230f34fec49156963b6a5d22becb

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