Add missing Java 1.6 @Override annotations

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/jcs/trunk@1584224 13f79535-47bb-0310-9956-ffa450edef68
Tidy up

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/jcs/trunk@1584225 13f79535-47bb-0310-9956-ffa450edef68