code: public ZealotConfigManager initLoadXmlLocations(String xmlLocations) {
          this.xmlLocations = StringHelper.isBlank(xmlLocations) ? "zealot" : xmlLocations;
          XmlScanner.newInstance().scan(this.xmlLocations);
          this.cachingXmlAndEval();
          return this;
      }
docs: 扫描 xml文件所在的文件位置 并识别配置加载到内存缓存中.
  @param xmlLocations zealot的XML文件所在的位置
  @return ZealotConfigManager的全局唯一实例