Delay on Xsens acquisition

[claudia-lat]

We found a 'native' problem in Xsens SW: if you do an acquisition/recording by using the MVN Studio (therefore without passing via YARP) there is a delay of few seconds between the clock of the computer where the SW is installed and the timestamp acquired by the sensor.
This problem doesn't affect the xsens-mvn driver since we use the MVN Studio SW for offline analysis only. But we could decide to modify this driver in order to obtain a file .mvn as well, without generating it from the MVN Studio SW.

cc @francesco-romano