e2e: tests: fix small typo
e2e: tests: fix small typo

Found when trying to get the e2e tests to run on Fedora which they
don't because of https://github.com/kr/pty/issues/21

glevand/coreos--etcd,hongchaodeng/etcd,yudai/etcd,fanminshi/etcd,armstrongli/etcd,insequent/etcd,a-robinson/etcd,mqliang/etcd,handsomesun/etcd,YuleiXiao/etcd,linuxcer/etcd,jonboulle/etcd,heyitsanthony/etcd,joshix/etcd,mickep76/etcd,CrazyJvm/etcd,purpleidea/etcd,swingbach/etcd,vimalk78/etcd,mqliang/etcd,ajityagaty/etcd,sebrandon1/etcd,westhood/etcd,lumjjb/etcd,ravigadde/etcd,mqliang/etcd,a-robinson/etcd,rchicoli/etcd,StorReduce/etcd,akauppi/etcd,xiang90/etcd,bdarnell/etcd,bluebreezecf/etcd,rnaveiras/etcd,armstrongli/etcd,plasticbox/etcd,luxas/etcd,ktateish/etcd,wantonsolutions/dinv-etcd,endocode/etcd,xiang90/etcd,coreos/etcd,westhood/etcd,visheshnp/etcd,sofuture/etcd,YuleiXiao/etcd,gyuho/etcd,lumjjb/etcd,rchicoli/etcd,etcd-io/etcd,bdarnell/etcd,endocode/etcd,tguangch/etcd,whuwxl/etcd,jonboulle/etcd,lorneli/etcd,rnaveiras/etcd,coreos/etcd,mkumatag/etcd,rnaveiras/etcd,whuwxl/etcd,visheshnp/etcd,tguangch/etcd,akauppi/etcd,linuxcer/etcd,sofuture/etcd,yudai/etcd,sinsharat/etcd,jlamillan/etcd,swingbach/etcd,insequent/etcd,OyTao/etcd_learning,glycerine/etcd,bluebreezecf/etcd,purpleidea/etcd,cockroachdb/etcd,etcd-io/etcd,nekto0n/etcd,lorneli/etcd,luxas/etcd,OyTao/etcd_learning,zaphod-concur/etcd,handsomesun/etcd,jlamillan/etcd,etcd-io/etcd,cockroachdb/etcd,sinsharat/etcd,zaphod-concur/etcd,heyitsanthony/etcd,ajityagaty/etcd,mkumatag/etcd,qqsun8819/etcd,nekto0n/etcd,chipironcin/etcd,ktateish/etcd,mickep76/etcd,StorReduce/etcd,fanminshi/etcd,plasticbox/etcd,CrazyJvm/etcd,ravigadde/etcd,glevand/coreos--etcd,li-ang/etcd,joshix/etcd,dannysauer/etcd,chipironcin/etcd,qqsun8819/etcd,hongchaodeng/etcd,wantonsolutions/dinv-etcd,sebrandon1/etcd,vimalk78/etcd,dannysauer/etcd,mkumatag/etcd,gyuho/etcd,glycerine/etcd,li-ang/etcd,wantonsolutions/dinv-etcd,ajityagaty/etcd