Fix NPE

Previous Sonar commit.

Author: garyrussell

spring-kafka/src/main/java/org/springframework/kafka/listener/KafkaMessageListenerContainer.java

@@ -706,10 +706,10 @@ private final class ListenerConsumer implements SchedulingAwareRunnable, Consume
 
 		private final Map<TopicPartition, Boolean> wasIdlePartition;
 
-		private final Header infoHeader = new RecordHeader(KafkaHeaders.LISTENER_INFO, this.listenerinfo);
-
 		private final byte[] listenerinfo = getListenerInfo();
 
+		private final Header infoHeader = new RecordHeader(KafkaHeaders.LISTENER_INFO, this.listenerinfo);
+
 		private final Set<TopicPartition> pausedForNack = new HashSet<>();
 
 		private Map<TopicPartition, OffsetMetadata> definedPartitions;