Reorder exception as some are not reachable

[fabienheureux]

I am working on an importer for another CMS (Spip), and base some of it on wagtail-wordpress-import. I noticed (thanks to my linter) that some exceptions were not reachable in this try / except block.

This PR fixes that :)

• Testing
  • [x] CI passes
  • [ ] If necessary, tests are added for new or fixed behaviour
  • [x] These changes do not reduce test coverage
• Documentation.
  • [ ] This PR adds or updates documentation
  • [x] Documentation changes are not necessary because these does neither touch to existing features nor business logic

[nickmoreton]

Hi @fabienheureux Thanks for the PR

I'm not sure when I will get time to review this soon but will do asap.

[fabienheureux]

@nickmoreton I am cleaning up old PRs.

Can I close this one ? I won't have time in a near future to continue working on it.