@Override
      public int compare(Map.Entry<String, String> ent, Map.Entry<String, String> ent2) {
        return ent.getKey().compareTo(ent2.getKey());
      }
Searches the given configuration object and replaces all the configuration values for keys
defined hive.conf.hidden.list by empty String

@param conf - Configuration object which needs to be modified to remove sensitive keys
common/src/java/org/apache/hadoop/hive/conf/HiveConfUtil.java