The server was running Trusty. Reimage to stretch and rename to the new naming scheme.
- disable puppet in labtestnet2003
- merge puppet patch to rename and get the new debian installer working
- merge dns patch to add the new FQDNs (partial, the old mgmt names still remains)
- run the wmf-auto-reimage-host script
- merge DNS cleanup patch
- netbox update https://netbox.wikimedia.org/dcim/devices/1686/
- get the physical relabeling done, switch port labels, etc (T219861)