Test for add/remove ContextVersion. The issue was reported for Tomcat 7 in "Time for 7.0.55" thread on dev mailing list.
I see no failures with Tomcat 8.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1610197 13f79535-47bb-0310-9956-ffa450edef68