Class CacheRegionKey is doubled

[fsilvani92]

When debugging caching issues, I stumbled upon TransactionalCache line 419. There, CacheRegionKeys are filtered out and their underlying key values should be returned. When executing the method I still got keys of a class "CacheRegionKey".

It turns out, there are 2 classes CacheRegionKey: One as a sub class of TranasactionalCache and one is a standalone class. The sub class is older being introduced with 4.0 while the standalone class was introduced in 4.2.

Both classes have the same serialVersionUID = -213050301938804468L and the same attributes in the same order, so I suspect this is an errror. The sub class has two additional get-methods, so it looks like there was a merge-conflict, where one branch moved the class into a new file and another branch added these methods and during merge it was decided to keep both classes, instead of moving the new methods to the moved class.