Fix invalid assert_has_calls

This is to fix the invalid assert_has_calls usage,
"assert_has_calls = " should be "assert_has_calls(".

Change-Id: Id094dd90efde09b9a835d4492f4a92b8f8ad296e

Author: zhufl

nova/tests/unit/compute/test_compute_mgr.py

@@ -10007,9 +10007,9 @@ def test_remove_remote_volume_connections(self, mock_remove_vol_conn):
 
         self.compute._remove_remote_volume_connections(self.context, 'fake',
                                                        bdms, instance)
-        mock_remove_vol_conn.assert_has_calls = [
+        mock_remove_vol_conn.assert_has_calls([
             mock.call(self.context, instance, bdm.volume_id, 'fake') for
-            bdm in bdms]
+            bdm in bdms])
 
     @mock.patch('nova.compute.rpcapi.ComputeAPI.remove_volume_connection')
     def test_remove_remote_volume_connections_exc(self, mock_remove_vol_conn):
@@ -10036,9 +10036,9 @@ def test_rollback_volume_bdms(self, mock_delete_attachment):
                 original_bdms, instance)
 
         # Assert that we delete the current attachments
-        mock_delete_attachment.assert_has_calls = [
+        mock_delete_attachment.assert_has_calls([
                 mock.call(self.context, uuids.vol1_attach),
-                mock.call(self.context, uuids.vol2_attach)]
+                mock.call(self.context, uuids.vol2_attach)])
         # Assert that we switch the attachment ids and connection_info for each
         # bdm back to their original values
         self.assertEqual(uuids.vol1_attach_original,