In ToT, test_that fails as follows:

$ test_that
WARNING:root:Unable to import chromite. Monarch is disabled.
Traceback (most recent call last):
  File "/mnt/host/source/src/third_party/autotest/files/site_utils/test_that.py", line 23, in <module>
    from autotest_lib.server.hosts import factory
  File "/mnt/host/source/src/third_party/autotest/files/server/hosts/__init__.py", line 16, in <module>
    from adb_host import ADBHost
  File "/mnt/host/source/src/third_party/autotest/files/server/hosts/adb_host.py", line 24, in <module>
    from autotest_lib.server import afe_utils
  File "/mnt/host/source/src/third_party/autotest/files/server/afe_utils.py", line 17, in <module>
    from autotest_lib.server.cros.dynamic_suite import frontend_wrappers
  File "/mnt/host/source/src/third_party/autotest/files/server/cros/dynamic_suite/frontend_wrappers.py", line 13, in <module>
    from autotest_lib.server import frontend
  File "/mnt/host/source/src/third_party/autotest/files/server/frontend.py", line 23, in <module>
    from chromite.lib import metrics
ImportError: cannot import name metrics