CORD-3049 fix error in unit test

Change-Id: I248c291ecc499e6dcd1dc9a38ab42c63fd733aaf
diff --git a/xos/synchronizer/tests/test_model_policy_exampleserviceinstance.py b/xos/synchronizer/tests/test_model_policy_simpleexampleserviceinstance.py
similarity index 99%
rename from xos/synchronizer/tests/test_model_policy_exampleserviceinstance.py
rename to xos/synchronizer/tests/test_model_policy_simpleexampleserviceinstance.py
index 3d85123..1960d84 100644
--- a/xos/synchronizer/tests/test_model_policy_exampleserviceinstance.py
+++ b/xos/synchronizer/tests/test_model_policy_simpleexampleserviceinstance.py
@@ -215,7 +215,7 @@
             self.assertEqual(deleted_ksi, ksi)
 
             # The serviceInstance should have had its compute_instance set to none
-            self.assertEqual(si.compute_instance.None)
+            self.assertEqual(si.compute_instance, None)
 
             # The SimpleExampleServiceInstance should have been saved
             self.assertEqual(sesi_save.call_count, 1)