Use monotonic timestamp as assumed by RobotAPI's RobotUnitModuleLogging

source/ArmarXSimulation/components/RobotUnitSimulation/RobotUnitSimulation.cpp

@@ -642,7 +642,7 @@ void RobotUnitSimulation::rtUpdateSensors(bool wait)
     }
 
     // This should be the timestamp from the time where the data was queried
-    const IceUtil::Time now = TimeUtil::GetTime();
+    const IceUtil::Time now = armarx::rtNow();
     //const IceUtil::Time now = IceUtil::Time::microSeconds(simulationDataTimestampInMicroSeconds);
     const IceUtil::Time timeSinceLastIteration = now - sensorValuesTimestamp;
     const float dt = static_cast<float>(timeSinceLastIteration.toSecondsDouble());