Move cgroups into reusable location.

BUG=chromium-os:26913
TEST=run_tests
TEST=cbuildbot x86-generic-full

Change-Id: I2c046aa60bcb30343781ba16ed933272eaeee63b
Reviewed-on: https://gerrit.chromium.org/gerrit/17064
Commit-Ready: Brian Harring <ferringb@chromium.org>
Reviewed-by: Brian Harring <ferringb@chromium.org>
Tested-by: Brian Harring <ferringb@chromium.org>
diff --git a/scripts/cbuildbot.py b/scripts/cbuildbot.py
index 9deaa05..abc6341 100644
--- a/scripts/cbuildbot.py
+++ b/scripts/cbuildbot.py
@@ -22,7 +22,6 @@
 from chromite.buildbot import cbuildbot_config
 from chromite.buildbot import cbuildbot_stages as stages
 from chromite.buildbot import cbuildbot_results as results_lib
-from chromite.buildbot import cgroup as cgroups
 from chromite.buildbot import constants
 from chromite.buildbot import gerrit_helper
 from chromite.buildbot import patch as cros_patch
@@ -30,6 +29,7 @@
 from chromite.buildbot import repository
 from chromite.buildbot import tee
 
+from chromite.lib import cgroups
 from chromite.lib import cros_build_lib as cros_lib
 from chromite.lib import sudo