Update for change in add_user_to_creator_group API.

cms/djangoapps/contentstore/tests/test_contentstore.py

@@ -931,7 +931,7 @@ class ContentStoreTest(ModuleStoreTestCase):
     def test_create_course_with_course_creator(self):
         """Test new course creation -- use course creator group"""
         with mock.patch.dict('django.conf.settings.MITX_FEATURES', {"ENABLE_CREATOR_GROUP": True}):
-            add_user_to_creator_group(self.user)
+            add_user_to_creator_group(self.user, self.user)
             self.assert_created_course()
 
     def assert_course_permission_denied(self):