MNK-5888 Break inheritance link between AbstractCacheTest and DiskStoreTest All CacheManager and Cache configuration is programmatic, to minimize setup time

git-svn-id: http://svn.terracotta.org/svn/ehcache@8553 b9324663-ca0f-0410-8574-be9b3887307d
ENG-368 : add os ehcache product upgradability tests

git-svn-id: http://svn.terracotta.org/svn/ehcache@8554 b9324663-ca0f-0410-8574-be9b3887307d