GitLab

* Extend the IPA bootstrappnig text a bit and use hostnames for the
example.

* set_ipa_pwpolicies.py reads the group_vars/all/vault.yml and expands
the password liftime of all activated users to five years in the future.

This role is not idempotent!
Add 'computer_name's to all host_vars/las*.las.kit.edu
Add and update OS infos in host_vars
Update host names for ipa_users

* Add all users exported from IPA

Decommission the computer standing at CN

colourful textboxes in different shapes (not sure if one can build a KIT
box out of it)

Write a minimal version of the vault tutorial section of the ansible docs.

* Eddy reactivates las112

* Add a role that adds the DHCP server and a failover server
* Use ansible-vault to encrypt the MAC-address mapping
* Fixes issue 7