future: catch unknown exceptions in callbacks
future: catch unknown exceptions in callbacks

Change-Id: I4d09ea6779a2d9a76ec8c572103e65822f4b1079
Reviewed-on: http://gerrit.aldebaran.lan:8080/17516
Reviewed-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>
Tested-by: cgestes <ddb78fe00abb42f91254c16a0860e38eb0781789@aldebaran-robotics.com>

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