e2e: remove server testing in etcdctl test
e2e: remove server testing in etcdctl test

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