GH-810: Add StreamsBuilderFB.setCleanupConfig()

Fixes #810

Author: adrien-ben

spring-kafka/src/main/java/org/springframework/kafka/config/StreamsBuilderFactoryBean.java

@@ -75,7 +75,7 @@ public class StreamsBuilderFactoryBean extends AbstractFactoryBean<StreamsBuilde
 
 	private Properties properties;
 
-	private final CleanupConfig cleanupConfig;
+	private CleanupConfig cleanupConfig;
 
 	private final List<Listener> listeners = new ArrayList<>();
 
@@ -234,6 +234,11 @@ public int getPhase() {
 		return this.phase;
 	}
 
+	public void setCleanupConfig(CleanupConfig cleanupConfig) {
+		Assert.notNull(cleanupConfig, CLEANUP_CONFIG_MUST_NOT_BE_NULL);
+		this.cleanupConfig = cleanupConfig;
+	}
+
 	/**
 	 * Get a managed by this {@link StreamsBuilderFactoryBean} {@link KafkaStreams} instance.
 	 * @return KafkaStreams managed instance;