Filter out the personal profile from "connected profiles" pages

[smirolo]

On the "connected profiles" page (http://localhost:8000/users/{user}/roles/), a personal profile for the authenticated user will show up if exist. It should be removed from the results returned by http://localhost:8000/api/users/{user}/accessibles.

References:

• https://www.djaodjin.com/docs/guides/accounts/
• https://www.djaodjin.com/docs/reference/djaoapp/latest/api/#listAccessibleBy

[smirolo]

done in PR #267