vm_au_worker: Use cros_run_vm_test.

Use cros_run_vm_test.py instead of the shell version.
Invoke image_to_live.sh with cros_run_vm_test instead of cros_run_update.

BUG=chromium:782664
TEST=amd64-generic-chromium-pfq

Change-Id: I93fe0052d426eaf806dfed350cbfa56d5ce88f9f
Reviewed-on: https://chromium-review.googlesource.com/1378794
Commit-Ready: Achuith Bhandarkar <achuith@chromium.org>
Tested-by: Achuith Bhandarkar <achuith@chromium.org>
Tested-by: Alex Zamorzaev <zamorzaev@chromium.org>
Reviewed-by: Alex Zamorzaev <zamorzaev@chromium.org>
1 file changed