Support for fqdn nodes

[lampwins]

Hello,

I have been using the terraform provider on f5devcentral (https://github.com/f5devcentral/terraform-provider-bigip) and have run into an issue with wanting to create fqdn based nodes. It seems that support is lacking in this library.

It also seems there is a divergent fork that f5devcentral is using, which of course does not track issues, so I am posting this here.

[kenmaglio]

This should now be completed based on pull request

https://github.com/scottdware/go-bigip/pull/71