WW-2120 Dispatcher does not put request parameters of new url on the value stack.

Files:
modified: /struts/struts2/trunk/core/src/main/java/org/apache/struts2/views/util/UrlHelper.java (try)
modified: /struts/struts2/trunk/core/src/main/java/org/apache/struts2/dispatcher/ServletDispatcherResult.java (try)