private void logMessage(List<String> messages, String message) {
    LOG.info(message);
    messages.add(message);
  }
Update Kerberos Descriptor Storm properties when upgrading to Storm 1.0
<p/>
Finds the relevant artifact entities and iterates through them to process each independently.
ambari-server/src/main/java/org/apache/ambari/server/serveraction/upgrades/UpgradeUserKerberosDescriptor.java