[CORD-1650]
Update TOSCA/variables to work with bridge/bond refactor

Change-Id: I8574fdef054d36216815ecd9237c23bcd1a56b90
diff --git a/templates/vtn-service.yaml.j2 b/templates/vtn-service.yaml.j2
index 6a2dbd6..4f5a419 100644
--- a/templates/vtn-service.yaml.j2
+++ b/templates/vtn-service.yaml.j2
@@ -44,7 +44,7 @@
           kind: platform
           view_url: /admin/vtn/vtnservice/$id$/
           privateGatewayMac: 00:00:00:00:00:01
-          localManagementIp: {{ management_network_ip }}
+          localManagementIp: {{ vtn_net_management_local_cidr | ipaddr('1') }}
           ovsdbPort: 6641
           sshUser: root
           sshKeyFile: /root/node_key