The installer was adding node hostnames (and accidentally the header "Name")
to allowed_nodes in addition to IPs. This caused:
1. Invalid entries like "Name", "minipc", "delly" in config
2. These are not valid for SSH temperature collection
Only IPs should be in allowed_nodes since that's what the proxy uses for SSH.
Removed the loop that added CLUSTER_NODE_NAMES to the array.
Also fixed: Removed extraction of CLUSTER_NODE_NAMES since it's no longer used.