Add project_id based target policy check
Add project_id based target policy check

Generate project_id target before doing policy check,
then the rules like the following can really take effect:

  - "owner":  "project_id:%(project_id)s"

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