EDIT

Implement single cache strategy for references #5833

• Implemented new class NewDefaultReferenceCacheStrategy and helper class TitleWithoutYearAndAuthorHelper
• Moved all functionality of old ReferenceCacheStrategies to new class(es)
• Moved all old strategies to package .old
• Moved all tests into one test class
• Removed all old tests
• Renamed abbrevTitleCache to fullAbbrevTitleString in cache strategies
• Added new method getNomenclaturalCache to cache strategy