Fixes #17173 -- Added some extra regression tests for reversing namespaced urls with special characters

The actual code was already fixed between 1.3.1 and trunk, but more thorough tests are always a good thing. Thanks for the patch, Yann Kaiser.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17075 bcc190cf-cafb-0310-a4f2-bffc1f526a37