message: [cluster_test] Auto restart cluster-test when it exits
  Closes:
  Approved by: ankushagarwal
diff: export ALLOW_DEPLOY=yes
  unset AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_SESSION_TOKEN
  +
  +while true; do
  mv run.out run.out.bak || echo 'run.out does not exist'
  -if ! ./cluster-test --workplace cluster-test --run > run.out ; then
  - REQUEST=\{\"text\":\"cluster_test\ terminated\"\}
  + REQUEST="{\"text\":\"cluster_test starting.\"}"
  + curl -X POST -H 'Content-type: application/json' --data "$REQUEST" "$SLACK_URL"
  + ./cluster-test --workplace cluster-test --run > run.out
  + REQUEST="{\"text\":\"cluster_test terminated with status: $?.\"}"
  curl -X POST -H 'Content-type: application/json' --data "$REQUEST" "$SLACK_URL"
  - exit 1
  -fi
  + sleep 30
  +done
  