Revised cluster_lock_create() function
Revised cluster_lock_create() function

Function is renamed to 'cluster_lock_acquire'; it will always return a
useful ID -- the original owner ID if lock failed, or the new owner ID
if lock succeeded.

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