Fix unit test

Author: mollyheamazon

sagemaker-mlops/tests/unit/sagemaker/mlops/feature_store/test_athena_query.py

@@ -15,6 +15,7 @@ def mock_session(self):
         session = Mock()
         session.boto_session.client.return_value = Mock()
         session.boto_region_name = "us-west-2"
+        session.sagemaker_config = {}
         return session
 
     @pytest.fixture