private void setMetastoreConfPropertyFromSystemProperty(MetastoreConf.ConfVars var) {
    if (System.getProperty(var.getVarname()) != null) {
      if (var.getDefaultVal().getClass() == Boolean.class) {
        MetastoreConf.setBoolVar(conf, var, Boolean.getBoolean(System.getProperty(var.getVarname())));
      } else {
        MetastoreConf.setVar(conf, var, System.getProperty(var.getVarname()));
      }
    }
  }
Returns the default UDF names which should not be removed when resetting the test database

@return The list of the UDF names not to remove
itests/util/src/main/java/org/apache/hadoop/hive/ql/QTestUtil.java