Test case for cluster_policies API
Test case for cluster_policies API

This patch adds test cases for cluster_policies API.

Change-Id: I0879d03bcae0e9c3bfb664d8a02ffc702089b0bb
Closes-Bug: 1469528

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