message: Test error message in hackatom integration test
diff: @@ -483,7 +483,9 @@ fn execute_panic() {
  &to_vec(&ExecuteMsg::Panic {}).unwrap(),
  );
  match execute_res.unwrap_err() {
  - VmError::RuntimeErr { .. } => {}
  + VmError::RuntimeErr { msg, .. } => {
  + assert_eq!(msg, "Wasmer runtime error: RuntimeError: unreachable")
  + }
  err => panic!("Unexpected error: {:?}", err),
  }
  }
  