Missing lints for invalid DNS names

[Iristyle]

This may be a problem downstream, but I noticed a couple of deployment failures on some YAML files that passed linting successfully:

• Invalid name on Secret. YAML that passed linting:

apiVersion: v1
kind: Secret
metadata:
  name: object_store

value should be object-store, not object_store

Error from attempted deploy:

Error from server (Invalid): error when creating "/Users/iristyle/source/holodeck/holodeck-manifests/output/cd4pe/overlays/midstream": Secret "object_store" is invalid: metadata.name: Invalid value: "object_store": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')

• Related, invalid reference to this name from a Deployment (only relevant YAML shown):

apiVersion: apps/v1
kind: Deployment
metadata:
  name: cd4pe
  namespace: 'cd4pe'
spec:
  selector:
    matchLabels:
      app.kubernetes.io/name: cd4pe
  template:
    metadata:
      labels:
        app.kubernetes.io/name: cd4pe
    spec:
      initContainers:
      - name: create-bucket
        image: minio/mc
        env:
        - name: MINIO_ACCESS_KEY
          valueFrom:
            secretKeyRef:
              name: object_store
              key: accessKey

value should be object-store, not object_store

Error message

Resource: "apps/v1, Resource=deployments", GroupVersionKind: "apps/v1, Kind=Deployment"
Name: "cd4pe", Namespace: "cd4pe"
for: "/Users/iristyle/source/holodeck/holodeck-manifests/output/cd4pe/overlays/midstream": Deployment.apps "cd4pe" is invalid: [spec.template.spec.containers[0].env[13].valueFrom.secretKeyRef.name: Invalid value: "object_store": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*'),

• Same basic problem with a preflight check

apiVersion: troubleshoot.replicated.com/v1beta1
kind: Preflight
metadata:
  name: cd4pe-preflight
spec:
  collectors:
  - run:
      name: object_store
      collectorName: object_store_credentials_valid
      image: minio/mc

object_store_credentials_valid should be object-store-credentials-valid