remove path::findListData

since it adds little value, and function names are confusing

Change-Id: I3557786b520b859760983840463f9bf09b89def2
Reviewed-on: http://gerrit.aldebaran.lan/29790
Reviewed-by: sbarthelemy <sbarthelemy@aldebaran-robotics.com>
Tested-by: gerrit
Reviewed-by: cgestes <gestes@aldebaran-robotics.com>
improve test_qios for timeval

The point is to show:

 * how slow it can be
 * that oveflow when summing two unnormalized timevals is not dealt
   with.

Change-Id: If6f58d46768ff21e67355057c27ab35aba1e64d2
Reviewed-on: http://gerrit.aldebaran.lan/30027
Reviewed-by: cgestes <gestes@aldebaran-robotics.com>
Reviewed-by: sdalibard <sdalibard@aldebaran-robotics.com>
Reviewed-by: sbarthelemy <sbarthelemy@aldebaran-robotics.com>
Tested-by: sbarthelemy <sbarthelemy@aldebaran-robotics.com>
qios: improve efficiency of timeval

Change-Id: I0e8d61171c9d977dc7a60b3e165daa9bcaccec3f
Reviewed-on: http://gerrit.aldebaran.lan/30028
Reviewed-by: cgestes <gestes@aldebaran-robotics.com>
Reviewed-by: sdalibard <sdalibard@aldebaran-robotics.com>
Reviewed-by: ccollette <ccollette@aldebaran-robotics.com>
Reviewed-by: sbarthelemy <sbarthelemy@aldebaran-robotics.com>
Tested-by: sbarthelemy <sbarthelemy@aldebaran-robotics.com>