[Checkins] [zopefoundation/Zope] 394e48: Use Travis trusty image.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Zope
  Commit: 394e48b0ad001eb7d457905bcfe812403f81e292
      https://github.com/zopefoundation/Zope/commit/394e48b0ad001eb7d457905bcfe812403f81e292
  Author: Hanno Schlichting <hanno at hannosch.eu>
  Date:   2017-04-27 (Thu, 27 Apr 2017)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Use Travis trusty image.