message: remove minimum machine type for gpu cluster.  Lower to standard-2 need
diff: @@ -7,10 +7,9 @@ set -e
  # Create a Kubernetes cluster
  gcloud alpha container clusters create \
  --enable-kubernetes-alpha \
  - --num-nodes 4 \
  + --num-nodes 40 \
  --accelerator type=nvidia-tesla-k80,count=1 \
  - --machine-type n1-standard-4 \
  - --min-cpu-platform "Intel Broadwell" \
  + --machine-type n1-standard-2 \
  --disk-size 30 \
  --preemptible \
  $CLUSTER_NAME
  