Fix warning message to show precise jump back in time duration

[AddisonFarley]

🦟 Bug fix

Fixes #2407 (Incorrect warning msg when sim jumps back in time)

Summary

Refactor the following warning message code:

if (_info.dt < std::chrono::steady_clock::duration::zero())
  {
    gzwarn << "Detected jump back in time ["
        << std::chrono::duration_cast<std::chrono::seconds>(_info.dt).count()
        << "s]. System may not work properly." << std::endl;
  }

to:

if (_info.dt < std::chrono::steady_clock::duration::zero())
{
  gzwarn << "Detected jump back in time ["
         << std::chrono::duration<double>(_info.dt).count()
         << "s]. System may not work properly." << std::endl;
}

for the following files:

src/systems/ackermann_steering/AckermannSteering.cc
src/systems/advanced_lift_drag/AdvancedLiftDrag.cc
src/systems/air_pressure/AirPressure.cc
src/systems/air_speed/AirSpeed.cc
src/systems/altimeter/Altimeter.cc
src/systems/apply_joint_force/ApplyJointForce.cc
src/systems/battery_plugin/LinearBatteryPlugin.cc
src/systems/contact/Contact.cc
src/systems/diff_drive/DiffDrive.cc
src/systems/force_torque/ForceTorque.cc
src/systems/imu/Imu.cc
src/systems/joint_controller/JointController.cc
src/systems/joint_position_controller/JointPositionController.cc
src/systems/lift_drag/LiftDrag.cc
src/systems/log/LogRecord.cc
src/systems/logical_camera/LogicalCamera.cc
src/systems/magnetometer/Magnetometer.cc
src/systems/mecanum_drive/MecanumDrive.cc
src/systems/multicopter_control/MulticopterVelocityControl.cc
src/systems/multicopter_motor_model/MulticopterMotorModel.cc
src/systems/navsat/NavSat.cc
src/systems/odometry_publisher/OdometryPublisher.cc
src/systems/pose_publisher/PosePublisher.cc
src/systems/touch_plugin/TouchPlugin.cc
src/systems/tracked_vehicle/TrackedVehicle.cc
src/systems/velocity_control/VelocityControl.cc
src/systems/wind_effects/WindEffects.cc

[iche033]

can you update the indentation to match what it was before (2 spaces)?

[AddisonFarley]

Fixed.

[iche033]

great, thanks for your contribution!