apollo-common/src/main/java/com/ctrip/framework/apollo/common/controller/GlobalDefaultExceptionHandler.java/GlobalDefaultExceptionHandler/restTemplateException
class GlobalDefaultExceptionHandler:  @ExceptionHandler(HttpStatusCodeException.class)
  public ResponseEntity<Map<String, Object>> restTemplateException(HttpServletRequest request,
                                                                   HttpStatusCodeException ex) {
    return handleError(request, ex.getStatusCode(), ex);
  }