openqa: Assign 'operator' permission automatically
For OpenQA to be useful to all GNOME contributors, they need to be empowered to fix test failures following the "how to update a test" workflow. Currently contributors must be manually given 'operator' permission after logging in to openqa.gnome.org before they can fix tests. It would be better to assign this automatically - login requires a GNOME LDAP account so anyone who can login already has a high level of trust within GNOME.