message: gimbal_device_tester: remove confusing signs
diff: @@ -289,7 +289,7 @@ public:
  std::stringstream limit_right;
  limit_right << "Pan " << yaw_max << " right";
  std::stringstream limit_left;
  - limit_left << "Pan " << -yaw_min << " left";
  + limit_left << "Pan " << yaw_min << " left";
  return test_pitch_yaw_angle(limit_right.str(), 0.0f, yaw_max, AttitudeData::Mode::Follow) &&
  test_pitch_yaw_angle(limit_left.str(), 0.0f, yaw_min, AttitudeData::Mode::Follow) &&
  @@ -327,7 +327,7 @@ public:
  std::stringstream limit_right;
  limit_right << "Pan " << yaw_max << " right";
  std::stringstream limit_left;
  - limit_left << "Pan " << -yaw_min << " left";
  + limit_left << "Pan " << yaw_min << " left";
  return test_pitch_yaw_angle(limit_right.str(), 0.0f, yaw_max, AttitudeData::Mode::Lock) &&
  test_pitch_yaw_angle(limit_left.str(), 0.0f, yaw_min, AttitudeData::Mode::Lock) &&
  