Flake8
Flake8
Various fixes.

- Bugfix. Allowed content types not determined when creating objects
  recursively.
- Set the 'title' of objects in the populate_* methods and not before, because
  there might be a restriction on what values the title field might have (i.e.
  when title is a Choice field with a specific vocabulary).
- Looks like there was some Archetypes only code in 'create_object'. Moved that
  to populate_archetype
Flake8