fix metadata for contrail 4.x

Change-Id: I5a5aa39f72cd745cf12309fe8e9e65d7b4075f5e
diff --git a/opencontrail/control/cluster4_0.yml b/opencontrail/control/cluster4_0.yml
index 1ee9ca5..9796930 100644
--- a/opencontrail/control/cluster4_0.yml
+++ b/opencontrail/control/cluster4_0.yml
@@ -83,6 +83,8 @@
         host: ${_param:openstack_control_address}
     control:
       config_only: true
+      identity:
+        host: ${_param:openstack_control_address}
       analytics:
         members:
         - host: ${_param:cluster_node01_address}