Add test for app forking from current folder, refs PR #2995.
Add test for app forking from current folder, refs PR #2995.

solarissmoke/django-oscar,solarissmoke/django-oscar,solarissmoke/django-oscar,django-oscar/django-oscar,solarissmoke/django-oscar,django-oscar/django-oscar,django-oscar/django-oscar,django-oscar/django-oscar