Multipath errors reported when moving pod from one worker node to another while using IBM CSI driver in OCS cluster

Issue

• IBM CSI driver fails to clear multipath device maps and uderlying subpaths after deleting
  pod.
• Below errors logged when pod is scheduled to another worker node in OCS cluster

Aug 27 15:56:43 workernodeX multipathd: 67:224: path wwid appears to have changed. Using map wwid.  <<<
Aug 27 15:56:43 workernodeX multipathd: 68:0: path wwid appears to have changed. Using map wwid.
...
Aug 27 16:04:12 workernodeX hyperkube: E0827 16:04:12.535818    2873 xxx] Operation for "{volumeName:<ibm_csi>^SVC:6005076400810325900000000000016E podName: nodeName:}" failed. No retries permitted until 2021-08-27 16:06:14 (durationBeforeRetry 2m2s). Error: "UnmountDevice failed for volume \"pvc-6c7f2a96-862b-42f5-a1e2-31431e937f71\" (UniqueName: \"<ibm_csi>^SVC:6005076400810325900000000000016E\") on node \"worker2.tjcocp\" : kubernetes.io/csi: attacher.UnmountDevice failed: rpc error: code = Internal desc = Multipath device [/dev/dm-16] was found as WWN [6005076400810325900000000000016e] via multipath -ll command, BUT sg_inq identify this device as a different WWN: [6005076400810325900000000000016b]. Check your multipathd."