specify the k8s version (use the default).
refs #18278
Arvados-DCO-1.1-Signed-off-by: Ward Vandewege <ward@curii.com>
This can be done via the "cloud console":https://console.cloud.google.com/kubernetes/ or via the command line:
<pre>
-$ gcloud container clusters create <CLUSTERNAME> --zone us-central1-a --machine-type n1-standard-2 --cluster-version 1.15
+$ gcloud container clusters create <CLUSTERNAME> --zone us-central1-a --machine-type n1-standard-2
</pre>
It takes a few minutes for the cluster to be initialized.