Automatic merge from submit-queue
Fix ceph-secret type to kubernetes.io/rbd in kubernetes-master charm
**What this PR does / why we need it**:
This fixes the type of the ceph-secret secret that's created by the kubernetes-master charm.
Without the `kubernetes.io/rbd` type, automatic provisioning of PVCs doesn't work.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
Fix ceph-secret type to kubernetes.io/rbd in kubernetes-master charm
```
Deprecation Notice: This directory has entered maintenance mode and will not be accepting new providers. Please submit new automation deployments to kube-deploy. Deployments in this directory will continue to be maintained and supported at their current level of support.
The scripts and data in this directory automate creation and configuration of a Kubernetes cluster, including networking, DNS, nodes, and master components.
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