Add Labradoor and Librador to Queue

Librador and Labradoor both introduce a large number of potential
changes. In this commit, we tackle the security protocols of Queue.
These will now be managed through Labradoor. Labradoor allows for a safe
communication protocol with Labracore and with SAML SSO.

For now, at least one error is made through the inconsistency of IDs
between Queue Users and Labracore Persons. This will be fixed later
though, as there is much more work to be done now.

Signed-off-by: Chris Lemaire <c.lemaire@student.tudelft.nl>