Fix hang in lettuce async test (#13609)

Author: laurit

instrumentation/lettuce/lettuce-5.0/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/lettuce/v5_0/LettuceAsyncClientTest.java

@@ -108,7 +108,7 @@ void testConnectUsingGetOnConnectionFuture() throws ExecutionException, Interrup
             new Utf8StringCodec(), new RedisURI(host, port, 3, TimeUnit.SECONDS));
     StatefulRedisConnection<String, String> connection1 = connectionFuture.get();
     cleanup.deferCleanup(connection1);
-    cleanup.deferCleanup(testConnectionClient::shutdown);
+    cleanup.deferCleanup(() -> shutdown(testConnectionClient));
 
     assertThat(connection1).isNotNull();