Delete signal parameter local reference
Delete signal parameter local reference

Delete the local reference as soon as possible.

Change-Id: Ic071803c5d216a62ebd86fb54b2cd93384e02143
Reviewed-on: http://gerrit.aldebaran.lan/72192
Reviewed-by: rvimont <20c35f6f0668496f51846e8638771ff6c82c8c27@presta.aldebaran.com>
Tested-by: gerrit
Reviewed-by: epinault <1abfa0def69a0dac55855768c5bb3267b3ee08b8@aldebaran-robotics.com>

aldebaran/libqi-java,aldebaran/libqi-java,aldebaran/libqi-java