[DNS] 'az network dns zone list' - change columns in output

[jtuliani]

Currently, 'az network dns zone list' includes the following columns in the output, in the following order: etag, location, maxnumberofrecordsets, numberofrecordsets, resource group name

There are unnecessary items here (e.g. location is always global, hence not necessary). Etag is deep-dive information that is useful in the 'show' command but takes up too much space to justify inclusion in the zone list. And the order does not put the most important stuff first.

Please change to: zone name, resource group name, number of record sets, max number of record sets.

Also, to save space, I suggest renaming 'Max Number Of Record Sets' and 'Number Of Record Sets' to simply 'Max Record Sets' and 'Record Sets', respectively. If necessary, that is.

[jtuliani]

Edited above text a little.