Use new RPC notifier

Stop using the deprecated rabbit_notifier.

Change-Id: I84574c555031b23fb5f256d248af1cdafc8979ce
Signed-off-by: Julien Danjou <julien@danjou.info>
diff --git a/lib/nova b/lib/nova
index d5cefc9..46b0069 100644
--- a/lib/nova
+++ b/lib/nova
@@ -395,7 +395,7 @@
     if is_service_enabled ceilometer; then
         add_nova_opt "instance_usage_audit=True"
         add_nova_opt "instance_usage_audit_period=hour"
-        add_nova_opt "notification_driver=nova.openstack.common.notifier.rabbit_notifier"
+        add_nova_opt "notification_driver=nova.openstack.common.notifier.rpc_notifier"
         add_nova_opt "notification_driver=ceilometer.compute.nova_notifier"
     fi