Better naming/tagging system for virtual nodes

Right now there's no way to distinguish which node is production which nodes are production candidates. Their instance name are all the same. Only way to distinguish which is which is by checking the description of the floating IP, which is really cumbersome.

$ openstack server list -c Name -c Networks | grep proxy
| http-proxy       | knightly-network=10.250.20.66, 138.26.48.80, 172.20.10.8    |
| http-proxy       | knightly-network=10.250.20.64                               |
| ssh-proxy        | knightly-network=10.250.20.133, 138.26.48.234, 172.20.10.31 |
| ssh-proxy        | knightly-network=10.250.20.42, 138.26.49.58, 172.20.10.32   |
| ssh-proxy        | knightly-network=10.250.20.254                              |
| http-proxy       | knightly-network=10.250.20.154, 138.26.49.45, 172.20.10.6   |
| ssh-proxy        | knightly-network=10.250.20.150                              |
| http-proxy       | knightly-network=10.250.20.22                               |
| ssh-proxy        | knightly-network=10.250.20.44                               |
| ssh-proxy        | knightly-network=10.250.20.197                              |