Getting closer still

* Got randomizer tress tests for metaraces refactors and made for forced
versions
* Got unit test for forced metarace randomizers as well
* Deleted all the set randomizers, as they did not confirm to working
through the interface. Could be re-incorporated as a later feature,
possibly, if requested.
* Refactor adjustments xml mapper to use collections mapper as inner
mapper
* Removed xml from table name for stat priority selector
* Added empty metarace for level adjustments
* Got all randomizers named and tested in bootstrap testing