fix(DEFECT-718): 消息提示，中文乱码问题

@@ -104,6 +104,7 @@ public class ThingsboardErrorResponseHandler extends ResponseEntityExceptionHand
     public void handle(HttpServletRequest request, HttpServletResponse response,
                        AccessDeniedException accessDeniedException) throws IOException,
             ServletException {
+        response.setCharacterEncoding("utf-8");
         if (!response.isCommitted()) {
             response.setContentType(MediaType.APPLICATION_JSON_VALUE);
             response.setStatus(HttpStatus.FORBIDDEN.value());
@@ -168,11 +169,13 @@ public class ThingsboardErrorResponseHandler extends ResponseEntityExceptionHand
         ThingsboardErrorCode errorCode = thingsboardException.getErrorCode();
         HttpStatus status = errorCodeToStatus(errorCode);
         response.setStatus(status.value());
+        response.setCharacterEncoding("utf-8");
         mapper.writeValue(response.getWriter(), ThingsboardErrorResponse.of(thingsboardException.getMessage(), errorCode, status));
     }
 
     private void handleRateLimitException(HttpServletResponse response, TbRateLimitsException exception) throws IOException {
         response.setStatus(HttpStatus.TOO_MANY_REQUESTS.value());
+        response.setCharacterEncoding("utf-8");
         String message = "Too many requests for current " + exception.getEntityType().name().toLowerCase() + "!";
         mapper.writeValue(response.getWriter(),
                 ThingsboardErrorResponse.of(message,
@@ -181,11 +184,13 @@ public class ThingsboardErrorResponseHandler extends ResponseEntityExceptionHand
 
     private void handleSubscriptionException(ThingsboardException subscriptionException, HttpServletResponse response) throws IOException {
         response.setStatus(HttpStatus.FORBIDDEN.value());
+        response.setCharacterEncoding("utf-8");
         mapper.writeValue(response.getWriter(),
                 (new ObjectMapper()).readValue(((HttpClientErrorException) subscriptionException.getCause()).getResponseBodyAsByteArray(), Object.class));
     }
 
     private void handleAccessDeniedException(HttpServletResponse response) throws IOException {
+        response.setCharacterEncoding("utf-8");
         response.setStatus(HttpStatus.FORBIDDEN.value());
         mapper.writeValue(response.getWriter(),
                 ThingsboardErrorResponse.of(ErrorMessage.NOT_HAVE_PERMISSION.getMessage(),
@@ -195,6 +200,7 @@ public class ThingsboardErrorResponseHandler extends ResponseEntityExceptionHand
 
     private void handleAuthenticationException(AuthenticationException authenticationException, HttpServletResponse response) throws IOException {
         response.setStatus(HttpStatus.UNAUTHORIZED.value());
+        response.setCharacterEncoding("utf-8");
         if (authenticationException instanceof BadCredentialsException || authenticationException instanceof UsernameNotFoundException) {
             mapper.writeValue(response.getWriter(), ThingsboardErrorResponse.of(ErrorMessage.USERNAME_PASSWORD_INCORRECT.getMessage(), ThingsboardErrorCode.AUTHENTICATION, HttpStatus.UNAUTHORIZED));
         } else if (authenticationException instanceof DisabledException) {