message: gimbal_device_tester: initialize attitude
  Otherwise, a gimbal device will never converge.
diff: @@ -755,6 +755,13 @@ int main(int argc, char** argv)
  AttitudeData attitude_data{};
  + // Drive it to 0 for initial convergence phase.
  + attitude_data.change_attitude_setpoint([&](AttitudeData::AttitudeSetpoint& attitude_setpoint) {
  + attitude_setpoint.roll_deg = 0.0f;
  + attitude_setpoint.pitch_deg = 0.0f;
  + attitude_setpoint.yaw_deg = 0.0f;
  + });
  +
  if (!test_device_information(mavlink_passthrough, attitude_data)) {
  return 1;
  }
  