old_contents: var HAVE_UNPROCESSED_MESSAGES_TAG_PREFIX = 'buffered-for-';
  
  module.exports = {
    nodeType:         'type',
    nodeRole:         'role',
    internalNodeName: 'internal-name',
    clusterId:        'cluster_id',
  
    acceptMessagesNewerThan:       'accept-newer-than',
    lastMessageTimestamp: 'last-timestamp',
  
    haveUnprocessedMessagesTagFor: function(nodeName) {
      return HAVE_UNPROCESSED_MESSAGES_TAG_PREFIX + nodeName;
    },
    isHaveUnprocessedMessagesTag: function(tag) {
      return tag.indexOf(HAVE_UNPROCESSED_MESSAGES_TAG_PREFIX == 0);
    },
    extractNodeNameFromHaveUnprocessedMessagesTag: function(tag) {
      return tag.replace(HAVE_UNPROCESSED_MESSAGES_TAG_PREFIX, '');
    }
  };
  
new_contents: var HAVE_UNPROCESSED_MESSAGES_TAG_PREFIX = 'buffered-for-';
  
  module.exports = {
    nodeType:         'type',
    nodeRole:         'role',
    internalNodeName: 'internal-name',
    clusterId:        'cluster_id',
  
    acceptMessagesNewerThan:       'accept-newer-than',
  
    haveUnprocessedMessagesTagFor: function(nodeName) {
      return HAVE_UNPROCESSED_MESSAGES_TAG_PREFIX + nodeName;
    },
    isHaveUnprocessedMessagesTag: function(tag) {
      return tag.indexOf(HAVE_UNPROCESSED_MESSAGES_TAG_PREFIX == 0);
    },
    extractNodeNameFromHaveUnprocessedMessagesTag: function(tag) {
      return tag.replace(HAVE_UNPROCESSED_MESSAGES_TAG_PREFIX, '');
    }
  };
  
subject: Remove obsolete tag