INTSAMPLES-89 - Upgrade to Spring Integration 2.2 RC3

* Test samples
* Polish documentation
* Polish code

For reference see: https://jira.springsource.org/browse/INTSAMPLES-89

basic/http/src/main/java/org/springframework/integration/samples/http/RequestGateway.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2012 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.
@@ -18,9 +18,11 @@ package org.springframework.integration.samples.http;
 
 /**
  * @author Oleg Zhurakousky
+ * @author Gunnar Hillert
  *
  */
 public interface RequestGateway {
 
-	public String echo(String request);
+	String echo(String request);
+
 }