Latest dimail modification lead to a bug in our app, preventing mailbox creation
from working properly. I swapped old dimail url to new one, mirrored dimail
modification and fixed tests and tada!
Teams feature is not ready for production yet,
so we need to deactivate it on productions environment.
preprod should be a copy of production,
so we need to deactivate it on preprod too.
We want people to create new mailboxes in La Régie.
This commit adds integration with intermediary dimail-api,
which will in turn send our email creation request to Open-Xchange.
