'FailedMount .... not registered' events during CronJob pod creation on OpenShift Container Platform 4.

Issue

Cronjob issue is related to **FailedMount** .... **not registered** events that are generated when a CronJob pod is created to run its task.

The events are similar to the following:

LAST SEEN   TYPE      REASON             OBJECT                                    MESSAGE
3h          Normal    Scheduled          pod/<name-of-the-cron-pod>--1-vbwfs   Successfully assigned <namespace>/<name-of-the-cron-pod>--1-vbwfs to <node-name>
3h          Normal    AddedInterface     pod/<name-of-the-cron-pod>--1-vbwfs   Add eth0 [XX.XX.XX.XX/XX] from openshift-sdn
3h          Normal    Pulling            pod/<name-of-the-cron-pod>--1-vbwfs   Pulling image "openshift/origin-cli:latest"
3h          Normal    Pulled             pod/<name-of-the-cron-pod>--1-vbwfs   Successfully pulled image "openshift/origin-cli:latest" in 1.211170383s
3h          Normal    Created            pod/<name-of-the-cron-pod>--1-vbwfs   Created container <name>
3h          Normal    Started            pod/<name-of-the-cron-pod>--1-vbwfs   Started container <name-of-cron-container>
178m        Warning   FailedMount        pod/<name-of-the-cron-pod>--1-vbwfs   MountVolume.SetUp failed for volume "<secret-name>" : object "<namespace>"/"<secret>" not registered
178m        Warning   FailedMount        pod/<name-of-the-cron-pod>--1-vbwfs   MountVolume.SetUp failed for volume "<config-map-map>-volume" : object "<namespace>"/"<config-map>" not registered
178m        Warning   FailedMount        pod/<name-of-the-cron-pod>--1-vbwfs   MountVolume.SetUp failed for volume "kube-api-access-ts9c2" : [object "<namespace>"/"kube-root-ca.crt" not registered, object "<namespace>"/"<secret>" not registered]
178m        Warning   FailedMount        pod/<name-of-the-cron-pod>--1-vbwfs   MountVolume.SetUp failed for volume "<config-map-name>" : object "<namespace>"/"<config-map>" not registered
3h          Normal    SuccessfulCreate   job/<name-of-the-cron-pod>            Created pod: <name-of-the-cron-pod>--1-vbwfs
178m        Normal    Completed          job/<name-of-the-cron-pod>            Job completed

As shown in the previous namespace events, errors are occurred showing that volumes are not mounted to the created pod.