[stable/minio] Add hook-delete-policy (#2655)

* [stable/minio] Add hook-delete-policy

As known, hook resources are not managed by helm directly. In case
"helm upgrade" is run against a minio release - it would fail with an
error: "Error: pods "<release-name>-minio-create-bucket" already
exists". Also, "helm delete" command would not delete the hook pod.

So, to make this more convenient, this commit adds a "hook-delete-policy"
annotation to the hook to automatically delete hook resources on success.

References:
- https://github.com/kubernetes/helm/blob/master/docs/charts_hooks.md#hook-resources-are-not-managed-with-corresponding-releases
- helm/helm#2692

* Bump chart version

stable/minio/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 description: Distributed object storage server built for cloud applications and devops.
 name: minio
-version: 0.3.2
+version: 0.4.0
 keywords:
 - storage
 - object-storage

stable/minio/templates/post-install-create-bucket-pod.yaml

@@ -10,6 +10,7 @@ metadata:
     heritage: "{{ .Release.Service }}"
   annotations:
     "helm.sh/hook": post-install
+    "helm.sh/hook-delete-policy": hook-succeeded
 spec:
   restartPolicy: OnFailure
   containers: