A docker build task can't retrieve gitlab_token from API when the user isn't internal

When the user launching the Git Worker import is internal, the workflow works perfectly, all tasks pass without any trouble.
But when the user isn't, the workflow breaks because Docker build tasks can't retrieve gitlab_token attribute (set to None when the requester isn't internal) from RetrieveRepository endpoint.

It's probably because build tasks aren't put in the internal group at creation