Improve keystone.conf [endpoint_policy] documentation
Improve keystone.conf [endpoint_policy] documentation

Change-Id: I9f849477be9c97b6025c2a0eeb62116151e211d7

rajalokan/keystone,rajalokan/keystone,mahak/keystone,cernops/keystone,mahak/keystone,rajalokan/keystone,ilay09/keystone,openstack/keystone,openstack/keystone,cernops/keystone,mahak/keystone,ilay09/keystone,ilay09/keystone,openstack/keystone