CORD-1244 cleanup use of get_tenant/get_service

Change-Id: I89474025859ad0d0faf148b5c25706035908c71f
diff --git a/xos/api/service/onos.py b/xos/api/service/onos.py
index a143b3d..5861947 100644
--- a/xos/api/service/onos.py
+++ b/xos/api/service/onos.py
@@ -34,7 +34,7 @@
     base_name = "onos"
     method_name = "onos"
     method_kind = "viewset"
-    queryset = ONOSService.get_service_objects().all()
+    queryset = ONOSService.objects.all()
     serializer_class = ONOSServiceSerializer
 
     custom_serializers = {"set_attribute": ServiceAttributeSerializer}