[Checkins] [zopefoundation/zope.app.publication] cc9685: Try to fix travis runs as suggested by @mgedmin.

[GitHub]

  Branch: refs/heads/fix_transaction_2
  Home:   https://github.com/zopefoundation/zope.app.publication
  Commit: cc968586bdfbdfbebeb4799f42d75f38a57ddcd9
      https://github.com/zopefoundation/zope.app.publication/commit/cc968586bdfbdfbebeb4799f42d75f38a57ddcd9
  Author: Michael Howitz <mh at gocept.com>
  Date:   2016-11-23 (Wed, 23 Nov 2016)

  Changed paths:
    M tox.ini

  Log Message:
  -----------
  Try to fix travis runs as suggested by @mgedmin.