Never exit calling process on qi::os::kill()

Change-Id: I5354558e330ebb7cfa63bd721b59e7d99df5c794
Reviewed-on: http://gerrit.aldebaran.lan:8080/18406
Reviewed-by: proullon <proullon@aldebaran-robotics.com>
Reviewed-by: cgestes <gestes@aldebaran-robotics.com>
Tested-by: proullon <proullon@aldebaran-robotics.com>
Fix test_qios on linux

Change-Id: I0cf67e704fe43a1d161efda44f7c299150c3f51d
Reviewed-on: http://gerrit.aldebaran.lan:8080/18411
Tested-by: gerrit
Reviewed-by: proullon <proullon@aldebaran-robotics.com>