Rename / promote 'olivneh' => 'ori'

- Disable 'olivneh' account in favor of 'ori'. Followed 'dandreescu' example.
- Add 'ori' account; promoted per 5936
- Key verification: https://office.wikimedia.org/wiki/User:Olivneh/key
- Reminder: Key needs to be added on stafford.

I'll clean up leftover 'olivneh' stuff in a follow-up commit once 'ori' is
sorted out.

Change-Id: Iebcf305f423b3a8ca94e214f59ed4e44ec033d7b
RT: 5936