Fix flaky Netty4Http3IT test suite (second attempt)

Signed-off-by: Andriy Redko <drreta@gmail.com>

Author: reta

modules/transport-netty4/src/test/java/org/opensearch/http/netty4/Netty4HttpClient.java

@@ -32,6 +32,8 @@
 
 package org.opensearch.http.netty4;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.opensearch.common.TriFunction;
 import org.opensearch.common.collect.Tuple;
 import org.opensearch.common.settings.Settings;
@@ -117,7 +119,8 @@
  * Tiny helper to send http requests over netty.
  */
 public class Netty4HttpClient implements Closeable {
-
+    private static final Logger logger = LogManager.getLogger(Netty4HttpClient.class);
+    
     static Collection<String> returnHttpResponseBodies(Collection<FullHttpResponse> responses) {
         List<String> list = new ArrayList<>(responses.size());
         for (FullHttpResponse response : responses) {
@@ -518,6 +521,8 @@ protected void initChannel(DatagramChannel ch) {
 
         @Override
         Channel prepare(Bootstrap clientBootstrap, Channel channel) throws InterruptedException {
+            logger.info("Connecting to: " + channel.remoteAddress());
+
             final QuicChannel quicChannel = QuicChannel.newBootstrap(channel)
                 .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 30000) // 30 seconds
                 .handler(new Http3ClientConnectionHandler())