fix qitest with relative qitest.json path

Change-Id: Id0e13e282c8298baee1f7310e0849c4f0fdf7f54
Reviewed-on: http://gerrit.aldebaran.lan/37514
Tested-by: gerrit
Reviewed-by: gjacob <gjacob@aldebaran-robotics.com>
Tested-by: gjacob <gjacob@aldebaran-robotics.com>