etcdserver: skip empty alarm from the query parameter
etcdserver: skip empty alarm from the query parameter

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