Replace _ with -
[ADD] Added website_sale_attachments module.
[IMP] 8.0-website_sale_attachments: changed add_attachment to public function and revised unittests to make them more friendly.
Merge branch '8.0-website_sale_attachments' of https://github.com/savoirfairelinux/edition-mgmt into 8.0-website_sale_attachments