Several bots had incorrect parameters, for OS and other fields.

Bug: chromium:833999
Change-Id: Id11001f3bfae6a7d52f9d6027afeb645cdeadd83
Reviewed-on: https://chromium-review.googlesource.com/1044288Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>