[IMP] auth_signup: Set self created users as customers
[IMP] auth_signup: Set self created users as customers

Since https://github.com/odoo/odoo/commit/9aaa32b6f62a95f58d11c17aefb4da4027371223
newly created users are not customers anymore.

But users created from frontend (like in the ecommerce) should be customers.

Specification
=============

Portal users created from auth_signup should be customers.

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