mozilla/moz-grid-config — pull request #48 by zacc (2012-04-16 17:32:18+00:00)
Title: Move beta/aurora/nightly to a single node

Remove beta/aurora/nightly from the mac.json file
Add json file for qa-selenium3 and retain b/a/n on that node.

Easier to maintain now that Beta is moving to nightly updates.