disco_web: do not count the pending tasks among the total tasks of a stage.
disco_web: do not count the pending tasks among the total tasks of a stage.

The pending tasks are in the job_coordinator and have not been given to the
disco_server. Therefore, they should not be counted when calculating the number
of waiting tasks.

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