NBInventory - adds device name if no primary IP

[jvanderaa]

• Updates NetBox name in docs
• Adds else statement to use device name if there is not a primary IP address

Fixes the NetBox plugin around issue 289, but not the rest of the plugins

[dbarrosop]

@wvandeun @clay584 would you mind looking at this PR and making sure it's also applied to your repo?

[wvandeun]

LGTM
@jvanderaa plugins are going to be split from the main Nornir project from version 3. The NetBox inventory plugin will move to its own repository.
Can you please raise a PR on that repo with the same changes?

On top of that we are also looking to deprecate NBInventory for NetBoxInventory2, which is available in the new repo, would be good if you incorporate the changes there as well.

https://github.com/wvandeun/nornir_netbox

[jvanderaa]

This was applied in the repo for the next iterations. Good to close or merge this PR @dbarrosop ?

[dbarrosop]

Thanks for the heads up, I will merge here as well as I want to release a 2.4.x release right before nornir 3.x :)