Issues with etcd certificates after replacing one master: error sending CSR to signer.

Issue

• After rebuilding a master node OpenShift in Openshift Container Platoform 4.1 ,the etcdservice on the node fails to establish as a peer with the other existing two etcd instances due to certificate issues.
• The cluster is functional with two members, however resilience is affected as a single master node failure will cause the cluster to stop functioning.
• Deletion of the node was done via "$ oc delete node $nodename", so the re-provision of the node was done with the same ignition config files for masters nodes which were generated during the initial cluster deployment.
• It is needed to remove the old etcdmember and replace it accordingly with the new master.