All veyron factory builders are failing the ManifestVersionedSync step.

e.g. https://uberchromegw.corp.google.com/i/chromeos.branch/builders/veyron_jerry%20factory%20factory-veyron-6591.B/builds/202

Logs given below:
22:32:20: INFO: RunCommand: repo manifest in /b/cbuild/shared_internal
22:32:21: INFO: RunCommand: repo selfupdate in /b/cbuild/shared_internal
repo version v1.12.37-cr1 is current
22:32:21: INFO: RunCommand: repo init --repo-url https://chromium.googlesource.com/external/repo --manifest-url https://chrome-internal-review.googlesource.com/chromeos/manifest-internal --manifest-name official.xml --manifest-branch factory-veyron-6591.B in /b/cbuild/shared_internal

repo has been initialized in /b/cbuild/shared_internal

@@@STEP_FAILURE@@@
22:32:22: ERROR: <type 'exceptions.AttributeError'>: 'RepoRepository' object has no attribute 'repo_cmd'
Traceback (most recent call last):
  File "/b/build/slave/veyron_jerry-factory-factory-veyron-6591.B/build/chromite/cbuildbot/failures_lib.py", line 153, in wrapped_functor
    return functor(*args, **kwargs)
  File "/b/build/slave/veyron_jerry-factory-factory-veyron-6591.B/build/chromite/cbuildbot/stages/sync_stages.py", line 562, in PerformStage
    next_manifest = self.GetNextManifest()
  File "/b/build/slave/veyron_jerry-factory-factory-veyron-6591.B/build/chromite/cbuildbot/stages/sync_stages.py", line 516, in GetNextManifest
    to_return = self.manifest_manager.GetNextBuildSpec(build_id=build_id)
  File "/b/build/slave/veyron_jerry-factory-factory-veyron-6591.B/build/chromite/cbuildbot/manifest_version.py", line 768, in GetNextBuildSpec
    self.CheckoutSourceCode()
  File "/b/build/slave/veyron_jerry-factory-factory-veyron-6591.B/build/chromite/cbuildbot/manifest_version.py", line 752, in CheckoutSourceCode
    self.cros_source.Sync(self.manifest)
  File "/b/build/slave/veyron_jerry-factory-factory-veyron-6591.B/build/chromite/cbuildbot/repository.py", line 345, in Sync
    if self._ForceSyncSupported():
  File "/b/build/slave/veyron_jerry-factory-factory-veyron-6591.B/build/chromite/cbuildbot/repository.py", line 315, in _ForceSyncSupported
    result = cros_build_lib.RunCommand([self.repo_cmd, 'sync', '--help'],
AttributeError: 'RepoRepository' object has no attribute 'repo_cmd'

22:32:22: INFO: Running cidb query on pid 8392, repr(query) starts with <sqlalchemy.sql.expression.Update object at 0x3474150>
************************************************************
** Finished Stage ManifestVersionedSync - Mon, 31 Oct 2016 22:32:23 -0700 (PDT)
************************************************************
22:32:23: INFO: Running cidb query on pid 8392, repr(query) starts with <sqlalchemy.sql.expression.Insert object at 0x3474c50>
22:32:23: INFO: Running cidb query on pid 8392, repr(query) starts with <sqlalchemy.sql.expression.Update object at 0x3474f50>