Issue fixes

apache-kafka-2/src/test/java/com/baeldung/kafka/message/ordering/ExtSeqWithTimeWindowIntegrationTest.java

@@ -35,11 +35,11 @@ public class ExtSeqWithTimeWindowIntegrationTest {
     private static KafkaProducer<Long, UserEvent> producer;
     private static KafkaConsumer<Long, UserEvent> consumer;
     private static final Duration TIMEOUT_WAIT_FOR_MESSAGES = Duration.ofSeconds(5);
-
-    private static final long BUFFER_PERIOD_NS = 5000L * 1000000; // 5000 milliseconds converted to nanoseconds
-    @Container
     private static final long BUFFER_PERIOD_NS = Duration.ofSeconds(5).toNanos();
 
+    @Container
+    private static final KafkaContainer KAFKA_CONTAINER = new KafkaContainer(DockerImageName.parse("confluentinc/cp-kafka:latest"));
+
     @BeforeAll
     static void setup() throws ExecutionException, InterruptedException {
         KAFKA_CONTAINER.addExposedPort(9092);