PURPOSE
=======
1. Unified product demo data
2. Less demo: one per use case
3. Demo data for all models
Specification
=============
1. Refactor all the brol in the demo data
2. Adapt the tests to make them green, as some products are
renamed, removed, created in python instead of as demo data
...
* migration to new API
* removed delivery.grid object, has been merged with delivery.carrier
* change view of delivery.carrier (price rules, etc.)
* tests from yml to py
* website : restrict the list of countries for delivery address in the shop