[test] Add a trivial test for "wdoc" view
We just make sure it gets rendered without errors (which wasn't the case
before the previous patch).
It does not work on Python 3; this will be fixed in next changeset.
Document: cubicweb-doc
Title: CubicWeb Documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/python-cubicweb-documentation/html/index.html
Files: /usr/share/doc/python-cubicweb-documentation/html/*