Add workaround for node['cpu']['total'] until fauxhai fix merges

- Set the node['cpu']['total'] value manually for each RUNNER
- This can be removed once https://github.com/customink/fauxhai/pull/77
  merges

Change-Id: Ie8e7eced230f89586c43f9637adae0c27ff95054
Partial-Bug: #1280309