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If no rendezvousIP nor static IP config is provided, then when generating an interactive image (AGENT-558) do not add the rendezvousIP config file (AGENT-555).
AGENT-558 Generate an unconfigured Agent Ignition
AGENT-555 Read rendezvousIP from a file
AGENT-559 Install configuration image
AGENT-562 Load config from config ISO
openshift/installer#7061: AGENT-555: Move Rendezvous Host config to separate file