private void setCustomConfs(HiveConf conf, Map<ConfVars,String> customConfigValueMap) {
    customConfigValueMap.entrySet().forEach(item-> conf.set(item.getKey().varname, item.getValue()));
  }
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