Autotest: firmware_UpdateKernelVersion and firmware_UpdateKernelDataKeyVersion

These two tests individually modify kernel version and kernel data key version.
On runtime, they modify kernel b directly, and reboot. Then, check the version,
and recovery.

BUG=chrome-os-partner:12442
TEST=run_remote_tests.sh --remote=$REMOTE_IP --board=$BOARD --servo
    firmware_UpdateKernelVersion(or firmware_UpdateKernelDataKeyVersion)

Change-Id: Ic3ad3caed47ed6cdffc41d6df6f4696b74d350b7
Reviewed-on: https://gerrit.chromium.org/gerrit/31208
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
Commit-Ready: Chun-Ting Chang <ctchang@chromium.org>
Tested-by: Chun-Ting Chang <ctchang@chromium.org>
6 files changed