make get-netview default if the improved performance is available

[dl2n]

The new version of Get-NetView will be performant enough to be a reasonable default. Get-Sddc should adaptively make it default if present on the target system(s). Provide per-node diagnostics to guide where updating is required - consider doing this in the summary report.

[visvel]

I believe this is a simple one line fix @ 1024 to set $IncludeGetNetView = True?

[dl2n]

No, as we discussed, this needs to be adaptive to the actual presence of the improved version (however that lands).