Interfaces that have failed tests have confusing status

[Lee Trager]

I ran the internet-connectivity test which found a failure on an interface. On the network tab this causes "internet-connectivit..." to be shown. When I mouse over I can see it says "internet-connectivity fail" but the message is confusing when I first look at it.

[Caleb Ellis (caleb-ellis)]

The legacy node networking page is by far the most brittle code in maas-ui. I'm marking this as Low mainly because the less we touch that page, the less likely we are to introduce regressions. Plus it's relatively innocuous.

In all likelihood this will only get fixed once node details is rebuilt.