Investigate xsens termination output of the wireless suit

[yeshasvitirupachuri]

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Seems wireless suit termination is giving the issue observed in the demo as noted in https://github.com/dic-iit/lab-events-demos/issues/99#issuecomment-498228455.

The main problem at the moment is that when the suit is crashing we do not see any termination output. So, we need to investigate the xsens driver termination process. The termination at the xsens wearable device level need not be double checked as it is being tracked and fixed in https://github.com/robotology-playground/wearables/issues/37. We need to put debug code and check the termination of the xsens driver.

@lrapetti @kouroshD