fix __exit__ for timeout
fix __exit__ for timeout

jimgoo/zipline-fork,alphaBenj/zipline,morrisonwudi/zipline,bartosh/zipline,semio/zipline,morrisonwudi/zipline,dkushner/zipline,umuzungu/zipline,grundgruen/zipline,florentchandelier/zipline,semio/zipline,nborggren/zipline,humdings/zipline,dkushner/zipline,sketchytechky/zipline,ronalcc/zipline,CarterBain/AlephNull,DVegaCapital/zipline,euri10/zipline,Scapogo/zipline,MonoCloud/zipline,magne-max/zipline-ja,wilsonkichoi/zipline,wilsonkichoi/zipline,otmaneJai/Zipline,kmather73/zipline,stkubr/zipline,cmorgan/zipline,stkubr/zipline,magne-max/zipline-ja,grundgruen/zipline,dhruvparamhans/zipline,otmaneJai/Zipline,erikness/AlephOne,nborggren/zipline,ronalcc/zipline,kmather73/zipline,AlirezaShahabi/zipline,zhoulingjun/zipline,ChinaQuants/zipline,mattcaldwell/zipline,iamkingmaker/zipline,dhruvparamhans/zipline,florentchandelier/zipline,jordancheah/zipline,gwulfs/zipline,MonoCloud/zipline,michaeljohnbennett/zipline,joequant/zipline,zhoulingjun/zipline,davidastephens/zipline,CDSFinance/zipline,mattcaldwell/zipline,humdings/zipline,wubr2000/zipline,michaeljohnbennett/zipline,chrjxj/zipline,chrjxj/zipline,CDSFinance/zipline,ChinaQuants/zipline,jordancheah/zipline,keir-rex/zipline,enigmampc/catalyst,YuepengGuo/zipline,euri10/zipline,dmitriz/zipline,enigmampc/catalyst,StratsOn/zipline,umuzungu/zipline,iamkingmaker/zipline,cmorgan/zipline,CarterBain/AlephNull,AlirezaShahabi/zipline,quantopian/zipline,jimgoo/zipline-fork,keir-rex/zipline,gwulfs/zipline,aajtodd/zipline,YuepengGuo/zipline,DVegaCapital/zipline,StratsOn/zipline,sketchytechky/zipline,wubr2000/zipline,davidastephens/zipline,aajtodd/zipline,bartosh/zipline,erikness/AlephOne,dmitriz/zipline,Scapogo/zipline,joequant/zipline,quantopian/zipline,alphaBenj/zipline