This reverts commit 0b51d8b297.
I think that this config was complicated in the setup and potentially
confusing to have different rules in different places.
It's better to fix those spec files by either making them smaller or
removing the `module` block in the spec. We can reference the modules
explicitely where needed.
Before when you imported products and clicked the 'Set stock to zero for all existing products not present in the file' option it would set the on hand stock to 0 but if the variant was also set to be on demand the product would still be available for sale. This change makes sure the on demand setting is turned off too.
Fixes#6064.
