[代码优化](v2.6)：修复添加actuator依赖后无法启动的Bug

close https://github.com/elunez/eladmin/issues/511

eladmin-system/src/main/java/me/zhengjie/modules/security/config/SecurityConfig.java

@@ -76,7 +76,8 @@ public class SecurityConfig extends WebSecurityConfigurerAdapter {
     @Override
     protected void configure(HttpSecurity httpSecurity) throws Exception {
         // 搜寻匿名标记 url： @AnonymousAccess
-        Map<RequestMappingInfo, HandlerMethod> handlerMethodMap = applicationContext.getBean(RequestMappingHandlerMapping.class).getHandlerMethods();
+        RequestMappingHandlerMapping requestMappingHandlerMapping = (RequestMappingHandlerMapping) applicationContext.getBean("requestMappingHandlerMapping");
+        Map<RequestMappingInfo, HandlerMethod> handlerMethodMap = requestMappingHandlerMapping.getHandlerMethods();
         // 获取匿名标记
         Map<String, Set<String>> anonymousUrls = getAnonymousUrl(handlerMethodMap);
         httpSecurity