Observers fail to register when zk ensemble service domain is not yet available (#135)
Observers fail to register when zk ensemble service domain is not yet available (#135)

When ensemble DOMAIN is not yet available (happens in k8s when svc domain dns resolve is slow to resolve), observer peers (id>=2) fail to register and enter a crash loop.
Previously the DYNCONFIG was populated with peer nodes but `REGISTER_NODE` is false (domain not yet available) hence the `zu add` never called. Subsequently when peer is restarted the registration is never called
pravega/zookeeper-operator,pravega/zookeeper-operator,pravega/zookeeper-operator