605 logical routers should be attachable to vsys objects

[adambaumeister]

This PR enables vsys handling for logical routers.

[shinmog]

It looks like logical routers were added in PAN-OS 10.2...?

If that's the case, then the code for this needs to reflect that. You can refer to this code to see how to add a param for something that only started existing in a particular version:

https://github.com/PaloAltoNetworks/pan-os-python/blob/develop/panos/network.py#L155-L165

[adambaumeister]

@shinmog I added this, I think i got it right? In this way the parameter is excluded for PANOS < 10.2.0, but otherwise it is included. I initially thought I could just add a param with the version already specified but I see this has different behavior.

[shinmog]

So it was Google's AI that said PAN-OS 10.2. I'd just ask that you verify that as true, but otherwise the code looks spot on, so I'll approve it.