Upgraded from JSP/Servlet 2.1/2.5 to 2.2/3.0 (i.e., Tomcat 7), switched to a less buggy link in LinkbackExtractorTest.

git-svn-id: https://svn.apache.org/repos/asf/roller/trunk@1606608 13f79535-47bb-0310-9956-ffa450edef68