Avoid calling MakePremiumPerAccess twice (bug 890044)

As weird as it seems, removing that whole part solves the issue because
the price is already updated during the creation process just above
during the `bango_account_list_form.save()` call.
bump app-validator (bug 915953)
Merge pull request #1143 from davidbgk/890044-avoid-double-call

Avoid calling MakePremiumPerAccess twice (bug 890044)
Commit from Mozilla Verbatim by user mdinic@mozilla.com.: 323 of 5474 strings translated (2 fuzzy).
Bold font was 404 on /developers/
Merge pull request #1148 from davidbgk/917412-font-404

Bold font was 404 on /developers/
disallow robots from some paths
handle ObjectDoesNotExist in migration
Add object-level permissions for Collections (bug 906862)