FutureAdapter: Optimize.
FutureAdapter: Optimize.

Force the meta-ops we perform on type-erased futures to be synchronous.
We know the object is local.

Change-Id: I54747e45f803f404f809a7bbb3ead369a217806b
Reviewed-on: http://gerrit.aldebaran.lan/20407
Reviewed-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>
Tested-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>

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