Create odderon service account on Eglide

Summary:
Odderon is an IRC bot to run under 'odderon' account,
with a 'nasqueron-irc' service group allowed to sudo.

Ref T1129

Test Plan: sudo -u odderon whoami

Reviewers: Sandlayth, dereckson

Reviewed By: dereckson

Maniphest Tasks: T1129

Differential Revision: https://devcentral.nasqueron.org/D857