One more test case for deletion policy
One more test case for deletion policy

This adds a unit test that was missing from existing test coverage.

Change-Id: I3c6500e6510715eeac136a77d2af1c87e43c8ed3

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