v2auth: fix out of bounds in test
v2auth: fix out of bounds in test

etcd-io/etcd,etcd-io/etcd,etcd-io/etcd,mkumatag/etcd,mkumatag/etcd,ajityagaty/etcd,mqliang/etcd,rnaveiras/etcd,mqliang/etcd,mkumatag/etcd,rnaveiras/etcd,rnaveiras/etcd,ajityagaty/etcd,mqliang/etcd,ajityagaty/etcd