Ensure all pipelined commands use a dedicated connection to avoid lingering commands when using pipelining with flushing customization.

Original Pull Request: #2088

Author: mp911de

src/main/java/org/springframework/data/redis/connection/lettuce/LettuceConnection.java

@@ -936,7 +936,7 @@ void transaction(FutureResult<?> result) {
 
 	RedisClusterAsyncCommands<byte[], byte[]> getAsyncConnection() {
 
-		if (isQueueing()) {
+		if (isQueueing() || isPipelined()) {
 			return getAsyncDedicatedConnection();
 		}