[Checkins] [zopefoundation/Zope] 6ab3b2: Fix tests under Python 2.7.

[GitHub]

  Branch: refs/heads/py3
  Home:   https://github.com/zopefoundation/Zope
  Commit: 6ab3b23badf58147049bc85b7aa7a1f6a69f3e1e
      https://github.com/zopefoundation/Zope/commit/6ab3b23badf58147049bc85b7aa7a1f6a69f3e1e
  Author: Hanno Schlichting <hanno at hannosch.eu>
  Date:   2017-05-04 (Thu, 04 May 2017)

  Changed paths:
    M src/App/ProductContext.py
    M src/Products/PageTemplates/Expressions.py
    M src/ZPublisher/HTTPRequest.py
    M src/ZTUtils/Tree.py

  Log Message:
  -----------
  Fix tests under Python 2.7.