Fix defaults if K8s only

Change-Id: I88db22be421e17677ed0d005aeef20e2ddfd5d42
diff --git a/metadata/service/client/cluster.yml b/metadata/service/client/cluster.yml
index 8d0595f..3cfd124 100644
--- a/metadata/service/client/cluster.yml
+++ b/metadata/service/client/cluster.yml
@@ -5,6 +5,7 @@
     opencontrail_version: 3.0
     opencontrail_identity_port: 35357
     opencontrail_identity_version: '2.0'
+    openstack_control_address: 127.0.0.1
   opencontrail:
     client:
       enabled: True