Code review comment for ~steverydz/maas:fix-machine-listing-js-error

I suspect that the problem is in the websocket handler. It seems like the IP addresses are included only in the listing, and not when viewing only the node itself. I suspect that's causing problem, since it's unexpected that a single node has less information that the listing.

This seems to fix the issue, but I'd have to investigate further to see that it actually makes sense:

  http://paste.ubuntu.com/p/2TCYHb3Vk5/