CHERRY-PICK: hardware_SAT: add disk_thread argument to control disk stressing

We can use disk_thread to enable/disable -f argument in stressapptest.

BUG=chrome-os-partner:22209
TEST=run hardware_SAT test with disk_thread argument to True/False,
check the command of stressapptest.

Change-Id: I276e4391145dc923fb4aab2620db17a93bdebd66
Reviewed-on: https://chromium-review.googlesource.com/167827
Reviewed-by: Justin Chuang <jchuang@chromium.org>
Commit-Queue: Cheng-Yi Chiang <cychiang@chromium.org>
Tested-by: Cheng-Yi Chiang <cychiang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/195381
Reviewed-by: Bowgo Tsai <bowgotsai@chromium.org>
Commit-Queue: Justin Chuang <jchuang@chromium.org>
Tested-by: Justin Chuang <jchuang@chromium.org>
1 file changed