Add primary role for control nodes to contrail labs

Change-Id: I782533d256fa52e8c733d1da92357d9f363a6623
diff --git a/classes/cluster/os-ha-contrail-40/infra/config.yml b/classes/cluster/os-ha-contrail-40/infra/config.yml
index c1ef306..b6f2954 100644
--- a/classes/cluster/os-ha-contrail-40/infra/config.yml
+++ b/classes/cluster/os-ha-contrail-40/infra/config.yml
@@ -161,6 +161,7 @@
         openstack_control_node01:
           classes:
           - service.galera.master.cluster
+          - cluster.os-ha-contrail-40.openstack.control_init
           params:
             mysql_cluster_role: master
             linux_system_codename: xenial