tails::profile::rss2email and tails::meeting squat users' UIDs and GIDs

These 2 classes create users with a UID and GID in the 1000+ range, which is reserved for human users.

As a consequence, on misc.lizard our Puppet code fails to create boyska's user and group, which blocks me from completing his onboarding on the RM team (to be done by August 17).

Please:

• adjust these classes so they manage system users and groups, with UID and GID < 1000; this may require switching from user::managed to user and group with system => true
• move the already existing users and groups managed by these classes to their new UIDs and GIDs

Thanks in advance!