- I am pretty sure the point of the upgrade(Class) method is to be able to inject, so the instance manager has to be used.
- Add InstanceManager on Context, and also add newInstance(Class) - not really needed, but it probably doesn't hurt.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1459028 13f79535-47bb-0310-9956-ffa450edef68
Deprecate Base64 and switch to DatatypeConverter

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1459031 13f79535-47bb-0310-9956-ffa450edef68
Remove Base64 and the associated test case

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1459032 13f79535-47bb-0310-9956-ffa450edef68