replace exit() with sys.exit(), as suggested by Ben Bangert.
replace exit() with sys.exit(), as suggested by Ben Bangert.

TarasRudnyk/fabric,sdelements/fabric,askulkarni2/fabric,cgvarela/fabric,pgroudas/fabric,rane-hs/fabric-py3,ploxiln/fabric,rodrigc/fabric,likesxuqiang/fabric,rbramwell/fabric,jaraco/fabric,kmonsoor/fabric,ericholscher/fabric,hrubi/fabric,kxxoling/fabric,SamuelMarks/fabric,akaariai/fabric,mathiasertl/fabric,felix-d/fabric,getsentry/fabric,bitmonk/fabric,bitprophet/fabric,opavader/fabric,simon-engledew/fabric,cmattoon/fabric,MjAbuz/fabric,elijah513/fabric,fernandezcuesta/fabric,pashinin/fabric,tekapo/fabric,bspink/fabric,tolbkni/fabric,StackStorm/fabric,haridsv/fabric,xLegoz/fabric,raimon49/fabric,amaniak/fabric,itoed/fabric,qinrong/fabric