Signal: in tests, prefer using qi::SignalSpy
Signal: in tests, prefer using qi::SignalSpy

Change-Id: Ic0cf98943fa5904cb26505f40cf602de10fbf1f7
Reviewed-on: http://gerrit.aldebaran.lan/67924
Reviewed-by: jlamotte <70353e7b0c7d18b7fc75605daf0ccba69fcd3222@aldebaran.com>
Tested-by: vpaleologue <cb19838a79eb484e12a6960acfbf7c16dfdb80d9@aldebaran-robotics.com>

aldebaran/libqi,aldebaran/libqi,aldebaran/libqi