Add opencontrail_node_role parameter for contrail nodes

Use opencontrail_node_role parameter to perform one-shot
operations on cluster level.

Related-PROD: PROD-23789
Change-Id: I417316a41b85fa54e3eb0e82814c199026f495f2
diff --git a/opencontrail/control/control.yml b/opencontrail/control/control.yml
index e846f5d..4719dff 100644
--- a/opencontrail/control/control.yml
+++ b/opencontrail/control/control.yml
@@ -30,6 +30,8 @@
       identity:
         region: ${_param:openstack_region}
         host: ${_param:openstack_control_address}
+    control:
+      role: ${_param:opencontrail_node_role}
     web:
       analytics:
         host: ${_param:opencontrail_analytics_address}