qiservice.py : get sys.argv only where needed
qiservice.py : get sys.argv only where needed

Change-Id: I5914686ca3d4b9dd445c158b7eaef6a5a1f274c9
Reviewed-on: http://gerrit.aldebaran.lan:8080/6074
Reviewed-by: proullon <ffff9135679d397f48dd743107119b1f6fc32d3d@aldebaran-robotics.com>
Tested-by: proullon <ffff9135679d397f48dd743107119b1f6fc32d3d@aldebaran-robotics.com>

aldebaran/libqi-java,aldebaran/libqi,aldebaran/libqi-java,aldebaran/libqi,aldebaran/libqi-java,bsautron/libqi,vbarbaresi/libqi,aldebaran/libqi