Add a new exception type 'ResourceUpdateFailure'
Add a new exception type 'ResourceUpdateFailure'

This exception type is used to handle exceptions that happened
when Senlin is updating resources from other services.

Change-Id: Ia455d649be59307a7ba254a085c5848e8513f072

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