lightbar: Add 'ectool lightbar seq stop' to setUp.

Also run 'ectool lightbar seq run' instead of 'ectool lightbar off' in
tearDown.

BUG=chrome-os-partner:29583
TEST=manually on DUT

Change-Id: Ibcfb956adba4185aad19c962ba441a61dd50990f
Reviewed-on: https://chromium-review.googlesource.com/205389
Reviewed-by: Ricky Liang <jcliang@chromium.org>
Commit-Queue: Ricky Liang <jcliang@chromium.org>
Tested-by: Ricky Liang <jcliang@chromium.org>
1 file changed