Fix unittests in cbuildbot_stages.
Fix unittests in cbuildbot_stages.

BUG=chromium-os:19043
TEST=Ran the unittest ;)

Change-Id: I8a6888eec317113e927e33f0c862fadd89b29562
Reviewed-on: http://gerrit.chromium.org/gerrit/5760
Reviewed-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Tested-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>

coreos/chromite,chadversary/chromiumos.chromite,zhang0137/chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,zhang0137/chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,coreos/chromite,zhang0137/chromite