CORD-1053 refactored onboarding recipe for vtr

Change-Id: I4f03140197b9643d48a4f739dd2c26d2ac91af58
diff --git a/xos/synchronizer/vtr_from_api_config b/xos/synchronizer/vtr_from_api_config
index 1b20d7c..27c52d7 100644
--- a/xos/synchronizer/vtr_from_api_config
+++ b/xos/synchronizer/vtr_from_api_config
@@ -15,6 +15,7 @@
 proxy_ssh_user=root
 accessor_kind=api
 accessor_password=@/opt/xos/services/vtr/credentials/xosadmin@opencord.org
+required_models=VSGService, VTRService, VTRTenant, CordSubscriberRoot
 
 [networking]
 use_vtn=True