apollo-core/src/main/java/com/ctrip/framework/foundation/internals/provider/DefaultServerProvider.java/DefaultServerProvider/getServerPropertiesPath
class DefaultServerProvider:  String getServerPropertiesPath() {
    final String serverPropertiesPath = getCustomizedServerPropertiesPath();

    if (!Strings.isNullOrEmpty(serverPropertiesPath)) {
      return serverPropertiesPath;
    }

    return Utils.isOSWindows() ? DEFAULT_SERVER_PROPERTIES_PATH_ON_WINDOWS
        : DEFAULT_SERVER_PROPERTIES_PATH_ON_LINUX;
  }