Annotation(s) for additional CMs/Secrets to watch

[aaron-trout]

I have an initContainer on one of my deployments which reads stuff directly from a Kubernetes Secret. This doesn't currently get picked up by Wave because that Secret is not in any volumes or env/envFrom.

It would be handy if there was an optional annotation to specify extra configmaps / secrets to watch. Something like:

annotations:
  wave.pusher.com/update-on-config-change: "true"
  wave.pusher.com/extra-configmaps: "some-namespace/my-configmap"
  wave.pusher.com/extra-secrets: "some-namespace/my-secret,some-other-namespace/foo"

For now, I have worked around this by defining a Volume but not actually mounting it into any containers in the pod.