Add Kafka Listener environment variable

Add Kafka Listener environment variable. Apparently newer versions of Kafka do not work nicely with Test Containers yet without the KAFKA_LISTENERS environment variable. Uncovered this solution through a GitHub issue with testcontainers -> testcontainers/testcontainers-java#9506
Although the referred-to issue is from November 2024, the issue lies with Kafka, which hasn't solved it yet.

#552

Author: smcvb

kafka-spring-boot-3-integrationtests/src/test/java/org/axonframework/extensions/kafka/integration/StreamableKafkaSourceIntegrationTest.java

@@ -41,7 +41,8 @@
 class StreamableKafkaSourceIntegrationTest {
 
     @Container
-    private static final KafkaContainer KAFKA_CONTAINER = new KafkaContainer("apache/kafka");
+    private static final KafkaContainer KAFKA_CONTAINER = new KafkaContainer("apache/kafka-native")
+            .withEnv("KAFKA_LISTENERS", "PLAINTEXT://:9092,BROKER://:9093,CONTROLLER://:9094");
 
     private ApplicationContextRunner testApplicationContext;
 

kafka-spring-boot-3-integrationtests/src/test/java/org/axonframework/extensions/kafka/integration/TokenReplayIntegrationTest.java

@@ -56,7 +56,8 @@
 class TokenReplayIntegrationTest {
 
     @Container
-    private static final KafkaContainer KAFKA_CONTAINER = new KafkaContainer("apache/kafka");
+    private static final KafkaContainer KAFKA_CONTAINER = new KafkaContainer("apache/kafka-native")
+            .withEnv("KAFKA_LISTENERS", "PLAINTEXT://:9092,BROKER://:9093,CONTROLLER://:9094");
 
     private ApplicationContextRunner testApplicationContext;