Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=54262
An empty <absolute-ordering /> should turn off all web-fragments. Based on a patch by  Violeta Georgieva.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1429946 13f79535-47bb-0310-9956-ffa450edef68