Domain reload tests should be isolated from each other as much aspossible. This framework dynamically creates sub-runners, assemblies,and python modules to do the domain load-unload in an isolated way.As each test requires it's own subprocess, we cannot use nUnit. Leveragepytest to run each subprocess instead.

Just retrieve the object and print it.

This fixes the error in bugpythonnet#1250 by separately serializing the FieldInfo.Probably this can be optimized a bunch. I haven't verified the performanceimplications at all.

Adds MaybeSerialize<T> which handles the reload nicely.Shows how to use it in FieldObject; it's very minimal changes to FieldObject to add this support.This is simpler than the proof of concept code.