Initial cluster token for every etcd cluster should be unique

[unmarshall]

How to categorize this issue?

/area control-plane
/kind bug

What happened:
It is a recommendation from upstream etcd to have unique initial-cluster-token as unique for every etcd cluster that is created.
See etcd-clustering-guide. Right now we are not impacted by because the peer URLs are unique. However we can easily change the initial-cluster-token to be the name of the Etcd resource.

What you expected to happen:
For every etcd cluster initial-cluster-token should be unique.