CORD-2865 get creator from subscriber object

Change-Id: I51bc8841ff1802949336849c79366cf10993ca4b
diff --git a/xos/synchronizer/steps/test_sync_vsgserviceinstance.py b/xos/synchronizer/steps/test_sync_vsgserviceinstance.py
index 31f3674..36f8307 100644
--- a/xos/synchronizer/steps/test_sync_vsgserviceinstance.py
+++ b/xos/synchronizer/steps/test_sync_vsgserviceinstance.py
@@ -99,8 +99,7 @@
                                                      "url_filter_level", "cdn_enable", "uplink_speed",
                                                      "downlink_speed", "enable_uverse", "status"])
         self.volt = MagicMock(s_tag=111, c_tag=222, subscriber=self.subscriber)
-        self.tenant = VSGServiceInstance(creator=self.user,
-                                         id=401,
+        self.tenant = VSGServiceInstance(id=401,
                                          volt=self.volt,
                                          owner=self.service,
                                          wan_container_ip="10.7.1.3",