config: decrease the default maximum number of failures per task
config: decrease the default maximum number of failures per task

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