This introduces oslo.messaging variables that define the RPC and Notify
transports for the OpenStack services. These parameters replace the
rabbitmq values and are used to generate the messaging transport_url for
the service. The association of the messaging backend server to the
oslo.messaging service will be transparent to the designate service.
This patch:
* Add oslo.messaging variables for RPC and Notify to defaults
* Update transport_url generation (add for notification)
* Add oslo.messaging to tests inventory
* Update tests
* Add releaes note
* Update README and example playbook
Change-Id: I620a13e1ea3c24c8bd31c02206613d37d769dd30
9625cb41fc