future: infinite wait by default (instead of 30secs)
future: infinite wait by default (instead of 30secs)

Change-Id: I276b781f9dd95f407bcd4c70b51c3a6b86347c61
Reviewed-on: http://gerrit.aldebaran.lan:8080/10078
Reviewed-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>
Tested-by: cgestes <ddb78fe00abb42f91254c16a0860e38eb0781789@aldebaran-robotics.com>

vbarbaresi/libqi,bsautron/libqi,aldebaran/libqi,aldebaran/libqi,aldebaran/libqi