Add a bulkdata flag

[timmow]

If this is set to false, do not mount the /nail/bulkdata volume

Tested by

• following instructions on this page

• editing etc_paasta_playground/volumes.json and adding the bulkdata volume

• running docker ps | grep kind to find the worker node container ids

• using these ids, running docker exec -t -i <id> bash and creating the /nail/bulkdata directory on the worker nodes

• editing config_playground/compute-infra-test-service/kubernetes-kind-tmower-k8s-test.yaml and setting bulkdata: false

• verifying with KUBECONFIG=./.paasta-kube-config kubectl get deployment -n paastasvc-compute-infra-test-service -oyaml the /nail/bulkdata volume was not added

I'm not entirely sure why black has reformatted the kubernetes_tools.py file