Create a new tomcat-util-scan.jar that contains the classes for JAR scanning and XML descriptor processing.
Update the .pom files with the new dependencies.
Review the .pom file dependencies and update to take account of Tomcat 8 refactoring.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1546365 13f79535-47bb-0310-9956-ffa450edef68
Fix NPE reported on users list when HTTP session ends

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1546372 13f79535-47bb-0310-9956-ffa450edef68
Tab police

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1546381 13f79535-47bb-0310-9956-ffa450edef68
Additional fix required for bug 55799

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1546382 13f79535-47bb-0310-9956-ffa450edef68