job_coordinator: Do not put the failed tasks in the pending list.
job_coordinator: Do not put the failed tasks in the pending list.

The pending list is going to be retried every-time the job coordinator has a
chance. The failed tasks however will be retried independently after the
timeout. Therefore, we end up running some tasks more than once.

oldmantaiter/disco,ErikDubbelboer/disco,mozilla/disco,ktkt2009/disco,discoproject/disco,ErikDubbelboer/disco,seabirdzh/disco,pooya/disco,simudream/disco,discoproject/disco,mwilliams3/disco,simudream/disco,beni55/disco,ktkt2009/disco,seabirdzh/disco,mozilla/disco,discoproject/disco,mozilla/disco,pombredanne/disco,pombredanne/disco,pooya/disco,beni55/disco,beni55/disco,mwilliams3/disco,pooya/disco,mwilliams3/disco,discoproject/disco,beni55/disco,simudream/disco,beni55/disco,ErikDubbelboer/disco,mozilla/disco,seabirdzh/disco,ktkt2009/disco,ktkt2009/disco,oldmantaiter/disco,oldmantaiter/disco,pombredanne/disco,seabirdzh/disco,mwilliams3/disco,mwilliams3/disco,simudream/disco,ktkt2009/disco,simudream/disco,ErikDubbelboer/disco,ErikDubbelboer/disco,pombredanne/disco,oldmantaiter/disco,pooya/disco,oldmantaiter/disco,discoproject/disco,pombredanne/disco,seabirdzh/disco