add bidirectional support to VTN api endpoint
diff --git a/xos/core/xoslib/methods/vtn.py b/xos/core/xoslib/methods/vtn.py
index c9dbf3a..dddde30 100644
--- a/xos/core/xoslib/methods/vtn.py
+++ b/xos/core/xoslib/methods/vtn.py
@@ -36,29 +36,13 @@
         return patterns
 
     def get_services_names(self, request, pk=None):
-        result = {}
-        for service in Service.objects.all():
-           for id in service.get_vtn_src_names():
-               dependencies = service.get_vtn_dependencies_names()
-               if dependencies:
-                   result[id] = dependencies
-        return Response(result)
+        return Response("This API was moved", status=501)
 
     def get_services(self, request, pk=None):
-        result = {}
-        for service in Service.objects.all():
-           for id in service.get_vtn_src_ids():
-               dependencies = service.get_vtn_dependencies_ids()
-               if dependencies:
-                   result[id] = dependencies
-        return Response(result)
+        return Response("This API was moved", status=501)
 
     def get_service(self, request, pk=None, service=None):
-        for xos_service in Service.objects.all():
-            if service in xos_service.get_vtn_src_ids():
-                return Response(xos_service.get_vtn_dependencies_ids())
-        return Response([])
-        # raise DoesNotExist()
+        return Response("This API was moved", status=501)
 
     def list(self, request):
         raise Exception("Not Implemented")