Fix test failure due to new setuptools/distribute

Nowadays setuptools always unzips eggs.  Add a renormalizer (one that
was already used for a different test file) so that either zipped or
unzipped setuptools egg is acceptable.

You can see the failure here: https://travis-ci.org/buildout/buildout/jobs/8250089
or here: http://winbot.zope.org/builders/zc_buildout_dev%20py_265_win32%20master/builds/318/steps/test/logs/stdio