MAINT: Compare datetime in test utils instead of integer.
MAINT: Compare datetime in test utils instead of integer.

Reduce dependency on date_utils, and improve legibility on failing
test.

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