Artefact::FORMATS_BY_DEFAULT_OWNING_APP = {
  'publisher' => [
    "course",
    "news",
    "person"
  ]
}
Artefact::FORMATS_BY_DEFAULT_OWNING_APP = {
  'publisher' => [
    "course",
    "news",
    "person"
  ],
  'whitehall' => [] # Need to define this empty so that govuk_content_models validators still work. See their slug_validator.rb for reasons.
}
Include empty whitehall array in formats list
Include empty whitehall array in formats list

So that GDS validators can work.
