Description of problem: ovnkube-node and multus DaemonSets have hostPath volumes which prevent clean unmount of CSI Volumes because of missing "mountPropagation: HostToContainer" parameter in volumeMount

Version-Release number of selected component (if applicable):  OpenShift 4.14

How reproducible:  Always

Steps to Reproduce:

1. on a node mount a file system underneath /var/lib/kubelet/ simulating the mount of a  CSI driver PersistentVolume

2. restart the ovnkube-node pod running on that node

3. unmount the filesystem from 1. The mount will then be removed from the host list of mounted devices however a copy of the mount is still active in the mount namespace of the ovnkube-node pod.
This is blocking some CSI drivers relying on multipath to properly delete a block device, since mounts are still registered on the block device.
 

Actual results:
CSI Volume Mount cleanly unmounted.
 

Expected results:
CSI Volume Mount uncleanly unmounted.
 

Additional info:

The mountPropagation parameter is already implememted in the volumeMount for the host rootFS:

            - name: host-slash
              readOnly: true
              mountPath: /host
              mountPropagation: HostToContainer

 However the same parameter is missing for the volumeMount of /var/lib/kubelet

It is possible to workaround the issue with a kubectl patch command like this:

$ kubectl patch daemonset ovnkube-node --type='json' -p='[
  {
    "op": "replace",
    "path": "/spec/template/spec/containers/7/volumeMounts/1",
    "value": {
      "name": "host-kubelet",
      "mountPath": "/var/lib/kubelet",
      "mountPropagation": "HostToContainer",
      "readOnly": true
   }
 }
]'

Affected Platforms: Platform Agnostic UPI