CORD-1177: Brought VTN service over to xproto

Change-Id: I668688418f478073b0dba91d56663212670c9c70
diff --git a/xos/vtn-onboard.yaml b/xos/vtn-onboard.yaml
index d454214..a999bce 100644
--- a/xos/vtn-onboard.yaml
+++ b/xos/vtn-onboard.yaml
@@ -13,7 +13,7 @@
           base_url: file:///opt/xos_services/vtn/xos/
           # The following will concatenate with base_url automatically, if
           # base_url is non-null.
-          models: models.py
+          xproto: ./
           admin: admin.py
           django_library: synchronizer/vtnnetport.py
           admin_template: templates/vtnadmin.html