Enable multi_tenancy option for contrail

With "multi_tenancy" being turned off it is possible to send any queries
to Contrail API without auth.

Change-Id: I0c36c04f39577394880551356de2f880e3125fc8
closes-bug: PROD-16867
diff --git a/opencontrail/control/control.yml b/opencontrail/control/control.yml
index 50c0c77..e846f5d 100644
--- a/opencontrail/control/control.yml
+++ b/opencontrail/control/control.yml
@@ -4,7 +4,7 @@
 - system.haproxy.proxy.listen.opencontrail.control
 parameters:
   _param:
-    multi_tenancy: false
+    multi_tenancy: true
     opencontrail_message_queue_node01_address: ${_param:openstack_message_queue_node01_address}
     opencontrail_message_queue_node02_address: ${_param:openstack_message_queue_node02_address}
     opencontrail_message_queue_node03_address: ${_param:openstack_message_queue_node03_address}