If  a test  suite  fails  with a  Zope  error, then  'main_form'  will not  be
available for the  next test suite. This also allows to  assume that each test
suite will be ran from ERP5 main page.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk/utils@46026 20353a03-c40f-0410-a6d1-a30d3c3de9de