title: spring boot KafkaListener with mulitple group ids
body: <pre><code>    @KafkaListener(topics = "test, groupId = "G1")
    public void receiveMessage(@Header(KafkaHeaders.RECEIVED_MESSAGE_KEY) String key,
        @Payload final String message) {
      doStuff();
    }
  </code></pre>
  
  <p>I have 6 partitions and want to create 6 consumer in same group, lets say in one machine. 
  how can I achieve it ?
  1.by deploying 6 instances of app
  2.by creating 6 consumers in same app (duplicate code)
  any alternatives/suggestion ?</p>