e2e: enable tests related to auth and proxy
e2e: enable tests related to auth and proxy

mqliang/etcd,bluebreezecf/etcd,mqliang/etcd,YuleiXiao/etcd,visheshnp/etcd,mkumatag/etcd,visheshnp/etcd,glevand/coreos--etcd,glevand/coreos--etcd,ajityagaty/etcd,mkumatag/etcd,joshix/etcd,sinsharat/etcd,bluebreezecf/etcd,rnaveiras/etcd,YuleiXiao/etcd,xiang90/etcd,xiang90/etcd,rnaveiras/etcd,heyitsanthony/etcd,coreos/etcd,etcd-io/etcd,fanminshi/etcd,bdarnell/etcd,gyuho/etcd,akauppi/etcd,ajityagaty/etcd,sinsharat/etcd,whuwxl/etcd,sebrandon1/etcd,etcd-io/etcd,dannysauer/etcd,dannysauer/etcd,fanminshi/etcd,vimalk78/etcd,li-ang/etcd,akauppi/etcd,lorneli/etcd,ajityagaty/etcd,mkumatag/etcd,bdarnell/etcd,sebrandon1/etcd,mqliang/etcd,lorneli/etcd,joshix/etcd,cockroachdb/etcd,gyuho/etcd,coreos/etcd,rnaveiras/etcd,whuwxl/etcd,heyitsanthony/etcd,li-ang/etcd,vimalk78/etcd,etcd-io/etcd,cockroachdb/etcd