Move dnf-plugin-kickstart to pykickstart-3

[clumens]

Over the past two years, I've been working on a new version of pykickstart that cleans up a bunch of stuff and corrects some inherent flaws, as well as stops using certain deprecated python modules. The result is that there are some incompatibilities between v2 and v3. The projects that are most affected are the ones that really dig in and do a lot of custom stuff. It's been in the works a long time now and with anaconda starting to adapt, I feel like it's probably time to get rid of pykickstart-2 and use pykickstart-3 in Fedora.

There is a copr with the new version here: https://copr.fedorainfracloud.org/coprs/clumens/pykickstart-3/, and there's a document describing the changes here: https://github.com/rhinstaller/pykickstart/blob/master/docs/2to3.

I've looked at dnf-plugin-kickstart.py and it doesn't look like there's anything that actually needs to change, however it would be worth double checking. If there's any specific tests that can be run, I'd be happy to try them out and develop any patches required. Any thoughts on this?

[Conan-Kudo]

There's a test suite that ships with the kickstart plugin, so if it works with kickstart3, it should be fine.