Create an ops group with full sudo capability

Summary:
The 'ops' group contains operations squad members with root access
to Eglide or the Docker engine (dereckson, sandlayth).

The GID is keep in sync with Woods Cloud groups configuration.

This will allow to drop the kludge to restore a wheel group,
and avoid to fight OS like Debian who want to manage such gid=0 group.

Ref T1034.

Test Plan: sudo whoami

Reviewers: Sandlayth, tomjerr, dereckson

Reviewed By: Sandlayth, dereckson

Maniphest Tasks: T1034

Differential Revision: https://devcentral.nasqueron.org/D1067