fork chromite modules here

Autotest is stuck on Python 2.  Fork the unused modules in here to
untangle the dependency on chromite.  If Autotest every migrates to
Python 3, it can move back to chromite.

The fork is imported as utils/frozen_chromite/ and can be imported there.

BUG=chromium:1049711
TEST=CQ passes

Change-Id: I58d7ae3802750d6c53ec0a0f794cb5664364f211
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/2393472
Reviewed-by: Derek Beckett <[email protected]>
Commit-Queue: Mike Frysinger <[email protected]>
Tested-by: Mike Frysinger <[email protected]>
diff --git a/cli/skylab_utils.py b/cli/skylab_utils.py
index 5fb7c6a..76d3951 100644
--- a/cli/skylab_utils.py
+++ b/cli/skylab_utils.py
@@ -10,7 +10,7 @@
 import common
 
 from autotest_lib.client.common_lib import revision_control
-from chromite.lib import gob_util
+from autotest_lib.utils.frozen_chromite.lib import gob_util
 
 try:
     from skylab_inventory import text_manager