[16.0][FIX] base_user_role: default roles

[danielduqma]

When granting access to a contact, a copy from Portal User Template is made for it. But applied default roles are the ones from Default User Template, causing an error when trying to assign both internal and portal types to new user.

Steps to reproduce

1. Create a new role, assigning it group User types / Internal User
2. Assign this role to user Default User Template
3. Grant access to a res.partner (Actions > Grant portal access and then GRANT ACCESS)

FL-556-4543

[OCA-git-bot]

Hi @sebalix, @novawish, @jcdrubay,
some modules you are maintaining are being modified, check this out!

[miguelcb2003]

LGTM!