We had a major issue because the latest dev channel release pre-dates the virtio change. Because of this, ctest was connecting to update that channel using virtio (which is unsupported for that). This change drops a file telling the vm lib to use e1000 as before.
Also, fixed stateful change logic.
Change-Id: I394a8cece71bdd0d55efa21ba5b6d24804432c6b
BUG=chromium-os:10434
TEST=Ran it with ctest and cros_au_test_harness on images with/without the file.
Review URL: http://codereview.chromium.org/5928005