This was only ever testing that Java files relating to the JSPs in question appear in the database, so there's no need for a particularly wide selection.
We are no longer bound to the platform-specific directories, so simplify the test organization.
If you don't want this change, just skip merging this PR. It's purely optional.
I kept the platform-specific directories around under `kotlin`,
but you could also easily merge all these together if you find them unhelpful.
I'll leave that change to you.
