Since https://review.opendev.org/656581 is merged (and the revert,
reverting the revert ...) there is no metadata service running.
This change removes all things related to setting up routes
to the metadata service, i.e the EC2MetadataIp. As well as NAT
firewall redirect rule used only on the undercloud but disabled
by default.
Blueprint: nova-less-deploy
Change-Id: Ic4ea74b45c566048e32dde82d2bf00498f932af6
7a52a6986e