Fix "Transition package to default java implementation" - apply patch from Ubuntu / James Page. Thanks to gregor herrmann <gregoa@debian.org>. (Closes: #683543)

Signed-off-by: Chris Lamb <lamby@debian.org>
Need to create "classes" dir.

Signed-off-by: Chris Lamb <lamby@debian.org>
releasing version 2.4.0-2