GroupRequest adjusts timeout improperly in doExecute

As GroupRequests are alerted to new responses, the total timeout to receive all responses decreases. This makes GroupRequests return from execute() without waiting for all responses within the true timeout.

I think this can be fixed by (in the doExecute() method ) by adding

start_time = System.currentTimeMillis();
timeout_time = start_time + timeout;

and replacing

timeout = timeout - (System.currentTimeMillis() - start_time);

with

timeout = timeout_time - System.currentTimeMillis();