Fix some Javadoc errors

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1515583 13f79535-47bb-0310-9956-ffa450edef68
Deprecate an unused class

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1515587 13f79535-47bb-0310-9956-ffa450edef68