With 405366fa32 the parameters RpcPort,
RpcUserName, RpcPassword and RpcUseSSL got deprecated and
nova::rabbitmq_port removed. As a result the healtcheck get called with
null parameter and fail.
We now get the global_config_settings from RabbitMQService and use
oslo_messaging_rpc_port for the healthcheck.
Change-Id: I1849926b1d6256de5f4d677de5a9b34d78aad5d0
Closes-Bug: #1824805
(cherry picked from commit 8ff04029f5)
847a2057c2