Create snippets for BAEL-2574 (#6344)

spring-boot-mvc/src/main/java/com/baeldung/accessparamsjs/App.java

@@ -9,5 +9,4 @@ public class App {
     public static void main(String[] args) {
         SpringApplication.run(App.class, args);
     }
-
 }

spring-boot-mvc/src/main/java/com/baeldung/accessparamsjs/Controller.java

@@ -23,10 +23,10 @@ public class Controller {
      * @return
      */
     @RequestMapping("/index")
-    public ModelAndView index(Map<String, Object> model) {
+    public ModelAndView thymeleafView(Map<String, Object> model) {
         model.put("number", 1234);
         model.put("message", "Hello from Spring MVC");
-        return new ModelAndView("/index");
+        return new ModelAndView("thymeleaf/index");
     }
 
 }