Fix flake8 error

Author: annabaas

tests/test_db_containers.py

@@ -102,6 +102,7 @@ def connect():
         for document in cursor:
             print(document)
 
+
 @pytest.mark.skip(reason="needs ms sql client libraries unavailable on Travis")
 def test_docker_run_mssql():
     config = SqlServerContainer()