Only print out ERROR log rather than DEBUG log as DEBUG is overly verbose.
Only print out ERROR log rather than DEBUG log as DEBUG is overly verbose.

Change-Id: If9603879ed4778a2c6bb037ec9ced0eb86482444

BUG=chromium-os:11682
TEST=Ran on tmp dir with failed test.  Saw error log get printed out rather than debug

Review URL: http://codereview.chromium.org/6639001

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