TST: Update answer key checksums on upload.
TST: Update answer key checksums on upload.

Automate the updating of the answer key when a new key is uploaded
to S3, so that keeping the latest value in sync is more likely.

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