This finally resolves issues with gradle confusing intellij by complaining about java incompatibilities (that were never a problem), so that it doesn't report test errors correctly.
This provides a much cleaner separation of concerns, and makes it possible to get rid of a lot of the gunkier parts of the index service. It will also permit lowering the Xmx on the index service a fair bit, so we can get CompressedOOps again :D
