auth: cleanup saveConsistentIndex in NewAuthStore
auth: cleanup saveConsistentIndex in NewAuthStore

etcd-io/etcd,coreos/etcd,mqliang/etcd,rnaveiras/etcd,rnaveiras/etcd,mkumatag/etcd,mqliang/etcd,mqliang/etcd,ajityagaty/etcd,etcd-io/etcd,etcd-io/etcd,cockroachdb/etcd,ajityagaty/etcd,mkumatag/etcd,mkumatag/etcd,coreos/etcd,dannysauer/etcd,rnaveiras/etcd,gyuho/etcd,dannysauer/etcd,cockroachdb/etcd,li-ang/etcd,gyuho/etcd,ajityagaty/etcd,li-ang/etcd