Orphan classes in java-support

[Tom Zeller]

> This spurred me to pick up an old AI of mine
> https://issues.shibboleth.net/jira/browse/JSPT-37 which was to check how
> many of these classes are being used.

> Can people take a pass over the list (which I have just reformatted to make
> it easier to read) and comment?

Just noting that I took a really quick pass over the list and
commented on the JIRA issue.