Re-enable consecutive boot test on chromebox.

- Firmware team run this test locally with km232 cable.
- Add faft_localrun parameters to separte lab run and local execution.
- fix cros_host.py get_board_type to handle missing DEVICETYPE
  parameter in lsb-release file and update site_utils.py get_board_type
  to do the same.

BUG=chromium:519078
TEST=Ran locally

Change-Id: I5bcc11d51c8b3314a8ea722e4fec0ed09800c416
Reviewed-on: https://chromium-review.googlesource.com/293949
Tested-by: danny chan <dchan@chromium.org>
Reviewed-by: Rohit Makasana <rohitbm@chromium.org>
Commit-Queue: danny chan <dchan@chromium.org>
9 files changed