[banquetarneaud] Fix login when rgpd pops

Sometimes, an rgpd pages pop when trying to logging, causing an
ActionNeeded. This page (that the user don't see) can be by-passed
by going on the bypass_rgpd url. This is what we do every time now when
we try to logging if we retrieve this page.
closes: 9023@zendesk
closes: 9529@zendesk