After running the quorum restore script we want to bring the other members back into the cluster automatically. 

Currently the init container in 

https://github.com/openshift/etcd/blob/openshift-4.17/openshift-tools/pkg/discover-etcd-initial-cluster/initial-cluster.go

is guarding that case by checking whether the member is part of the cluster already and has an empty datadir.

We need to adjust this check by testing whether the cluster id of the currently configured member and the current datadir refer to the same cluster.

When we detect a mismatch, we can assume the cluster was recovered by quorum restore and we can attempt to move the folder to automatically make the member join the cluster again.