Fix image service endpoint spec

After converging with telemetry and image, the ceilometer meters and
resources for glance do not appear, the logs show that the glance API
URL is incorrect: http://127.0.0.1:9292/v2/v1.

The openstack-common cookbook was updated to set the right path but we
need to update the test cases.

Change-Id: I656e133995b4cbad12540d03c97adf1164b0f4c5
Closes-Bug: #1293688
Fix incorrect QPID rpc_backend property

With notifier_strategy set to qpid the Glance-API fails to start due to
its rpc_backend driver being incorrect, it's the nova one, instead of
the glance one.

Change-Id: Ic697a827988ccddbe7c5ff3258d231d22d08d838
Closes-Bug: #1294333