Update example.

Fixes issue 7364.
Updating third_party/py/jython.jar to Jython 2.5.3
I don't often revert my changes, but when I do, I do it 4 times.

Revert "Still breaking things on CI."

This reverts commit 2f4b6524a7b5fa85cb81ae0ff9f660e9751b5666.