functional/tester: prevent embedded etcd running with failpoints
functional/tester: prevent embedded etcd running with failpoints

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

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