Revert "Major cleanup of cros_au_test_harness code."
Revert "Major cleanup of cros_au_test_harness code."

This reverts commit 2b2d7a1426f485bc2c6fb02399c52618db6dd0f2.

The internal x86 buildbots have been reporting failures from
cros_au_test_harness with every build, starting with the build
that included the change being reverted.

BUG=chromium-os:8901
TEST=None

Review URL: http://codereview.chromium.org/5962019

Change-Id: Iac8c0a13d659f927b3ff61a9a894c10191432e2d

sigma/coreos-scripts,bcwaldon/coreos-scripts,trnubo/scripts,crawford/scripts,zhang0137/scripts,vmware/coreos-scripts,mjg59/scripts,nicescale/scripts,glevand/coreos--scripts,andrejro/coreos--scripts,endocode/scripts,gtank/scripts,BugRoger/scripts,marineam/coreos-scripts,sigma/coreos-scripts,vmware/coreos-scripts,crawford/scripts,zhang0137/scripts,bcwaldon/coreos-scripts,fivethreeo/scripts,smilart/scripts,smilart/scripts,crawford/scripts,BugRoger/scripts,vmware/coreos-scripts,gtank/scripts,marineam/coreos-scripts,endocode/scripts,nicescale/scripts,andrejro/coreos--scripts,zhang0137/scripts,nicescale/scripts,trnubo/scripts,gtank/scripts,coreos/scripts,BugRoger/scripts,trnubo/scripts,andrejro/coreos--scripts,fivethreeo/scripts,smilart/scripts,mischief/scripts,mjg59/scripts,glevand/coreos--scripts,sigma/coreos-scripts,mischief/scripts,bcwaldon/coreos-scripts,endocode/scripts,marineam/coreos-scripts,coreos/scripts,mischief/scripts,mjg59/scripts,fivethreeo/scripts