Work on UDB and MDB admin panels

[Antoine Pietri]

Some bugs/problems encountered during the regionals:

• UDB seemed completely freezed (no way to edit a group or add an user)
• You have to manually specify the uids in UDB and the IP in MDB (no way to get a sane default)
• The ugly --uid-base in udb/manage.py
• MDB must reject invalid hostnames (eg. containing '_')

[Rémi Audebert]

• UDB seemed completely freezed (no way to edit a group or add an user)

Probably because we used a Django super admin that was not in the "root" udb group. We always have to use users created by batchimport to access udb or mdb admin panels.

• You have to manually specify the uids in UDB and the IP in MDB (no way to get a sane default)
• The ugly --uid-base in udb/manage.py

Created issue #44 for UID, and #45 for IP

• MDB must reject invalid hostnames (eg. containing '_')

In progress.

[Rémi Audebert]

Value validation added in:

• d5a3949 mdb: validate hostname value
• 27885b5 mdb: validate MAC address