Make AnnotationConfigSWSApp…Context implement AnnotationConfigRegistry

Closes gh-11658

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/context/AnnotationConfigServletWebServerApplicationContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.beans.factory.support.BeanNameGenerator;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.context.annotation.AnnotatedBeanDefinitionReader;
+import org.springframework.context.annotation.AnnotationConfigRegistry;
 import org.springframework.context.annotation.AnnotationConfigUtils;
 import org.springframework.context.annotation.AnnotationScopeMetadataResolver;
 import org.springframework.context.annotation.ClassPathBeanDefinitionScanner;
@@ -48,7 +49,7 @@ import org.springframework.web.context.support.AnnotationConfigWebApplicationCon
  * @see AnnotationConfigWebApplicationContext
  */
 public class AnnotationConfigServletWebServerApplicationContext
-		extends ServletWebServerApplicationContext {
+		extends ServletWebServerApplicationContext implements AnnotationConfigRegistry {
 
 	private final AnnotatedBeanDefinitionReader reader;