* Admin account is not always called Administrator (eg Azure)
* this fixes some, but not all issues related to the Administrator account on non-English Windows as well (still numerous references to "Administrators" and other en-US Windows group names)
* Divide Windows integration tests into 2 groups.
* Support `none` for `--changed-all-target`.
* Run 2 separate Windows groups on Shippable.
* Only run smoketest and minimal for the group1 job.
