public static long getTotalResources(List<AppResult> resultList) {
    long totalResources = 0;
    for (AppResult result : resultList) {
      totalResources += result.resourceUsed;
    }
    return totalResources;
  }
Given a configuration element, extract the params map.

@param confElem the configuration element
@return the params map or an empty map if one can't be found
app/com/linkedin/drelephant/util/Utils.java