Remove dependency on Tomcat internals from examples.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1515282 13f79535-47bb-0310-9956-ffa450edef68
Fix typos

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1515286 13f79535-47bb-0310-9956-ffa450edef68
Remove unused string

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1515290 13f79535-47bb-0310-9956-ffa450edef68