classic worker: make the partitions work under python3
classic worker: make the partitions work under python3

In python 3, hash is salted and will return a different value everytime it is
invoked, therefore, it cannot be used.

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