Add nova:compute:networking:contrail pillar to contrail labs

Change-Id: Icb364ff914c595c65a555496249f92335fbc0abe
diff --git a/classes/cluster/sl-os-contrail/openstack/compute.yml b/classes/cluster/sl-os-contrail/openstack/compute.yml
index c523b7c..0da8728 100755
--- a/classes/cluster/sl-os-contrail/openstack/compute.yml
+++ b/classes/cluster/sl-os-contrail/openstack/compute.yml
@@ -59,6 +59,7 @@
         topics: "notifications,${_param:stacklight_notification_topic}"
         notify_on:
           state_change: vm_and_task_state
+      networking: contrail
   ceilometer:
     agent:
       message_queue: