Revert "Make host-based factory toolkit the default" in 6420 branch

This reverts commit c0dc8340b18ad4763ebebbb925515e99969182cb

We got several factory UI bring up issues in this branch.
It looks like host-based testing is not very stable yet.
Revert this CL to use non host-based testing for rambi series devices.

BUG=chrome-os-partner:33670
TEST=None

Change-Id: I99a8b0d412aefaadb5987c480de888a3cdacdbd5
Reviewed-on: https://chromium-review.googlesource.com/235580
Commit-Queue: Bowgo Tsai <bowgotsai@chromium.org>
Tested-by: Bowgo Tsai <bowgotsai@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
1 file changed