Replace deprecated oslo.messaging.get_transport with get_notification_transport
Replace deprecated oslo.messaging.get_transport with get_notification_transport

DeprecationWarning: Using function/method 'oslo_messaging.transport.get_transport()'
is deprecated: use get_rpc_transport or get_notification_transport

Change-Id: If985e18fabaf99173844601057e5a8f0a1191721

openstack/zaqar,openstack/zaqar,openstack/zaqar,openstack/zaqar