Add shell account for hoo, admins restricted

RT #6731

labs user: hoo
UID: 2133
real name: Marius Hoch

requested/approved: csteipp, Eloquence

requested: accessing the DB (investigating bugs),
possibly:  general Wikidata deploys, debugging and config

Giving admins restricted first. After getting
used to the cluster this will be changed to mortals.

Change-Id: I225f6d54d9bbf948639a301456b76a682fa8bb4c