public String getHadoopConfDir() {
    return get(HADOOP_CONF_DIR);
  }
Dumps all env and config state.  Should be called once on WebHCat start up to facilitate 
support/debugging.  Later it may be worth adding a REST call which will return this data.
hcatalog/webhcat/svr/src/main/java/org/apache/hive/hcatalog/templeton/AppConfig.java