set-machine-ip-in-sledgehammer

DEPRECATED: Make sure that the EFI BootOrder variable has the NIC we installed from first.

/ This logic replicates what our DHCP server does behind the scenes to make sure that machines do not have conflicting addresses. This works because and Address of 0.0.0.0 is unset. Needed in >v4.3 because IP setting was removed from join-up.sh