Adding dependency of org.opencord.vtn on org.opencord.config

Change-Id: I4a8d5ee285a5622b6231d177d997b25854d9b7ff
diff --git a/xos-services/onos-service/templates/_tosca.tpl b/xos-services/onos-service/templates/_tosca.tpl
index 6ac4849..d487b7d 100644
--- a/xos-services/onos-service/templates/_tosca.tpl
+++ b/xos-services/onos-service/templates/_tosca.tpl
@@ -132,6 +132,7 @@
         app_id: org.opencord.vtn
         url: {{ .vtnAppURL }}
         version: 1.6.0
+        dependencies: org.opencord.cord-config
       requirements:
         - owner:
             node: service#ONOS_CORD