Occasional error on creating new world about additionalworlds

[skaldarnar]

I don't know how to reproduce this, although it occured occasionally for me, too. I've renamed this issue to be more general, as I could also encounter this for Forest World and others…
Since many of the generators still use plugins this might also be a source of error.

[PAndaContron]

It's inconsistent for you? For me this occurs every time I try to load I'm Getting Thirsty. I haven't tried many of the newly merged generators though.

[PAndaContron]

I've found and fixed the issue in the latest commit. The issue was coming from the fact that there are multiple classes for certain configurations. Even though Java is fine with this since they are totally separate subclasses in completely separate places, it seems that the world generation code only loads configuration class names, so the 5 MountainsConfiguration classes and 2 CaveFacetProviderConfiguration classes in separate generators were causing issues. I think the reason why the issue was unreliable is because it would load only one of each configuration, and only the generator whose configuration was loaded would work.