Use controller in Spring Boot sample

Issue gh-1647

Author: eleftherias

spring-session-samples/spring-session-sample-boot-hazelcast/src/main/java/sample/config/WebMvcConfig.java renamed to spring-session-samples/spring-session-sample-boot-hazelcast/src/main/java/sample/config/IndexController.java

@@ -16,16 +16,15 @@
 
 package sample.config;
 
-import org.springframework.context.annotation.Configuration;
-import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
-import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
 
-@Configuration
-public class WebMvcConfig implements WebMvcConfigurer {
+@Controller
+public class IndexController {
 
-	@Override
-	public void addViewControllers(ViewControllerRegistry registry) {
-		registry.addViewController("/").setViewName("index");
+	@RequestMapping("/")
+	public String index() {
+		return "index";
 	}
 
 }