fix(i18n): disable host locale fallback (#741)

Signed-off-by: FenjuFu <92919259+FenjuFu@users.noreply.github.com>

server/skillhub-app/src/main/resources/application.yml

@@ -13,6 +13,7 @@ server:
 spring:
   messages:
     basename: messages
+    fallback-to-system-locale: false
   application:
     name: skillhub
   lifecycle:

server/skillhub-app/src/test/java/com/iflytek/skillhub/security/ApiAccessDeniedHandlerTest.java

@@ -38,6 +38,7 @@ class ApiAccessDeniedHandlerTest {
     @BeforeEach
     void setUp() {
         ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
+        messageSource.setFallbackToSystemLocale(false);
         messageSource.setBasename("messages");
         messageSource.setDefaultEncoding("UTF-8");
         RequestIdAccessor requestIdAccessor = new RequestIdAccessor();