use SERVICE_HOST intead of HOST_IP for quantum services

The other services, like nova, glance and cinder, use SERVICE_HOST
instead of HOST_IP to configure their server listening addresses.
This is more friendly to multi-node quantum deployment.

Change-Id: Ibee22ef59d532e8f7004d8e4582015d303d15404
Remove temporary logic for Quantum auth_token transition

When Quantum auth_token configuration were moved to quantum.conf,
the temporary logic to disable auth_token in api-paste.ini was added
to avoid gating test failures of patches based on the version with
api-paste.ini auth_token configurations.
This temporary logic is no longer needed.

Change-Id: I539301a338d5ada01c83af5e9cf203849a67c6c1
On unstack : clean up network namespaces created by quantum

Also removes OVS ports

Fix Bug #1156837

Change-Id: Id4178c0a12a3ada76403a57a736a9c7a908d6a4a
Merge "use SERVICE_HOST intead of HOST_IP for quantum services"
Merge "On unstack : clean up network namespaces created by quantum"
Merge "Remove temporary logic for Quantum auth_token transition"