code: public ZealotConfigManager initLoadHandlerLocations(String handlerLocations) {
          this.handlerLocations = handlerLocations;
          TaggerScanner.newInstance().scan(handlerLocations);
          return this;
      }
docs: 扫描 handler文件所在的文件位置 并识别配置加载到内存缓存中.
  @param handlerLocations zealot的自定义handler处理器所在的位置
  @return ZealotConfigManager的全局唯一实例