deploy.py gives gcloud api error '... Version "1.8.1-gke.1" is invalid.'

[cwbeitel]

Deploy command

> PROJECT_ID=$(get_project_id)
> SALT=`date | shasum -a 256 | cut -c1-8`
> CHART=https://storage.googleapis.com/tf-on-k8s-dogfood-releases/latest/tf-job-operator-chart-latest.tgz
> python -m py.deploy setup --project ${PROJECT_ID} --cluster kubeflow-${SALT} \
  --zone us-east1-d --chart $CHART --junit_path /tmp/junit-info

gives

INFO:root:Creating cluster; project=kubeflow-rl, zone=us-east1-d, name=kubeflow-7bdc62bc
ERROR:root:Exception occured creating cluster: <HttpError 400 when requesting https://container.googleapis.com/v1/projects/kubeflow-rl/zones/us-east1-d/clusters?alt=json returned "Version "1.8.1-gke.1" is invalid.">, status: 400
Traceback (most recent call last):
  File "/Users/cb/miniconda2/envs/dev/lib/python2.7/runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/Users/cb/miniconda2/envs/dev/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/Users/cb/code/project/tmp/k8s/py/deploy.py", line 210, in <module>
    main()
  File "/Users/cb/code/project/tmp/k8s/py/deploy.py", line 207, in main
    args.func(args)
  File "/Users/cb/code/project/tmp/k8s/py/deploy.py", line 63, in setup
    util.create_cluster(gke, project, zone, cluster_request)
  File "py/util.py", line 164, in create_cluster
    response = request.execute()
  File "/Users/cb/miniconda2/envs/dev/lib/python2.7/site-packages/oauth2client/util.py", line 137, in positional_wrapper
    return wrapped(*args, **kwargs)
  File "/Users/cb/miniconda2/envs/dev/lib/python2.7/site-packages/googleapiclient/http.py", line 842, in execute
    raise HttpError(resp, content, uri=self.uri)
googleapiclient.errors.HttpError: <HttpError 400 when requesting https://container.googleapis.com/v1/projects/kubeflow-rl/zones/us-east1-d/clusters?alt=json returned "Version "1.8.1-gke.1" is invalid.">

Suggest changing initialClusterVersion to "1.7.11-gke.1".