Add ResponseBodyInterceptor

This change introduces a new ResponseBodyInterceptor interface that can
be used to modify the response after @ResponseBody or ResponseEntity
methods but before the body is actually written to the response with the
selected HttpMessageConverter.

The RequestMappingHandlerAdapter and ExceptionHandlerExceptionResolver
each have a property to configure such interceptors. In addition both
RequestMappingHandlerAdapter and ExceptionHandlerExceptionResolver
detect if any @ControllerAdvice bean implements ResponseBodyInterceptor
and use it accordingly.

Issue: SPR-10859

spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/ResponseBodyInterceptorChainTests.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2002-2014 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.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.web.servlet.mvc.method.annotation;
+
+/**
+ * @author Rossen Stoyanchev
+ * @since 4.1
+ */
+public class ResponseBodyInterceptorChainTests {
+
+
+}