Add inhibit job for cros-disks in test image

We want auto-mount disabled in factory test image so that it will not
confuse our test programs.

BUG=chrome-os-partner:24798
TEST=Boot factory test image and verify cros-disks is inhibited.

Change-Id: Iebcffab66e0a0f568f8cdef84cfbe5ad80c574bc
Reviewed-on: https://chromium-review.googlesource.com/206628
Reviewed-by: Vic Yang <victoryang@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ricky Liang <jcliang@chromium.org>
Tested-by: Ricky Liang <jcliang@chromium.org>
1 file changed