plugin/etcd: the etcd client adds the DialKeepAliveTime parameter (#6351)

plugin/etcd/setup.go

@@ -101,6 +101,7 @@ func newEtcdClient(endpoints []string, cc *tls.Config, username, password string
 	etcdCfg := etcdcv3.Config{
 		Endpoints:         endpoints,
 		TLS:               cc,
+		DialKeepAliveTime: etcdTimeout,
 	}
 	if username != "" && password != "" {
 		etcdCfg.Username = username