Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=54552
Servlet 3.1
Implement HttpSessionIdListener and HttpServletRequest#changeSessionId()
Patch provided by Nick Williams. 

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1445517 13f79535-47bb-0310-9956-ffa450edef68