test: enable static analysis "SA4004"
test: enable static analysis "SA4004"

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

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