Remove CM_Model_Splittest::_isVariationFixtureStatic()
Remove CM_Model_Splittest::_setConversionStatic
Remove CM_Model_Splittest::_setConversionStatic
Fully remove $_withoutPersistence
Use paging to check if splittest exists
Add test for CM_Model_Splittest::exists
Remove cache flushes in tests (now done through containing cacheables)