Change boot_fail_threshold to 0.
Change boot_fail_threshold to 0.

The majority of users will benefit from boot_fail_threshold of 0
which means that if any boot fails, the whole run is considered a
failure.

Change-Id: If07f11fe4f102b7819b8ed10548d076a28dfad05
Signed-off-by: Michael Walsh <10404802c7de463f402c4a18638106ca1b12ef61@us.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation