Convert to JUnit 4

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1435505 13f79535-47bb-0310-9956-ffa450edef68
Convert to JUnit 4

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1435509 13f79535-47bb-0310-9956-ffa450edef68