functional-tester/agent: fix govet shadow in Go tip
functional-tester/agent: fix govet shadow in Go tip

Signed-off-by: Gyuho Lee <3454051ee3341eb69bdf6fca40899cdad4d86496@gmail.com>

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