Exercise the node-selection block from preprocess_request and the lookup
adjustment from makeconfluentcfg directly, both extracted from the shipped
plugin, with a stand-in nodehm table.
Assert that an explicitly named node is configured whether it has no console
attributes or no nodehm row at all, that neither lookup can emit an empty node
name, and that the full table scan still skips console-less nodes so an entire
cluster is not swept into confluent. That last group is what separates this
from simply removing the skip, and it fails if the skip is dropped outright.
Vinícius Ferrão