fix cluster ports in bench

Author: ndyakov

bench_test.go

@@ -277,7 +277,7 @@ func BenchmarkXRead(b *testing.B) {
 
 func newClusterScenario() *clusterScenario {
 	return &clusterScenario{
-		ports:     []string{"16379", "16380", "16381", "16382", "16383", "16384"},
+		ports:     []string{"16600", "16601", "16602", "16603", "16604", "16605"},
 		nodeIDs:   make([]string, 6),
 		processes: make(map[string]*redisProcess, 6),
 		clients:   make(map[string]*redis.Client, 6),