Updated verity error_behavior and max_ios defaults to match expected values

BUG=chromium-os:34696
TEST=Run ensure_secure_kernelparams.sh on an image built with this change

Change-Id: I16a6f5127bdfae958f9cd0d9ce1b0c55a0f68c67
Reviewed-on: https://gerrit.chromium.org/gerrit/33888
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Ready: Liam McLoughlin <lmcloughlin@chromium.org>
Tested-by: Liam McLoughlin <lmcloughlin@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/34022
Tested-by: Chris Masone <cmasone@chromium.org>
3 files changed