bugfix: handle already started lock_server.
bugfix: handle already started lock_server.

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