Fix javadoc issues

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/validator/trunk@1647900 13f79535-47bb-0310-9956-ffa450edef68
Let RAT do the license header checking

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/validator/trunk@1647901 13f79535-47bb-0310-9956-ffa450edef68