Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=54999
Fix JSESSIONIDSSO not recreated when a logout and login occur in the same request.
Patch provided by Keith Mashinter

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1487863 13f79535-47bb-0310-9956-ffa450edef68