Ensure only supported listeners are instantiated

Previously all EventListeners were eagerly instantiated
but that can cause problems because it happens quite early
in the lifecycle. Better to be explicit about the
supported types.

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration.java

@@ -47,6 +47,7 @@ import org.springframework.core.io.ResourceLoader;
 import org.springframework.format.Formatter;
 import org.springframework.format.FormatterRegistry;
 import org.springframework.web.accept.ContentNegotiationManager;
+import org.springframework.web.context.request.RequestContextListener;
 import org.springframework.web.filter.HiddenHttpMethodFilter;
 import org.springframework.web.servlet.DispatcherServlet;
 import org.springframework.web.servlet.View;
@@ -134,6 +135,12 @@ public class WebMvcAutoConfiguration {
 			return resolver;
 		}
 
+		@Bean
+		@ConditionalOnMissingBean(RequestContextListener.class)
+		public RequestContextListener requestContextListener() {
+			return new RequestContextListener();
+		}
+
 		@Bean
 		@ConditionalOnBean(View.class)
 		public BeanNameViewResolver beanNameViewResolver() {