message: update comment
  Closes:
diff: @@ -378,7 +378,8 @@ fn create_test_cases() -> Vec<Test> {
  resp.error.expect("error").message,
  "Server error: Mempool submission error: \"Failed to update gas price to 0\"".to_string(),
  );
  - // wait to make sure we don't impact next the following tests
  + // wait submitted transaction executed, so that the following tests won't have
  + // problem when need to submit same account transaction.
  env.wait_for_txn(&txn1);
  });
  },
  