ENG-492 system test for cache destroy with crash in the middle

git-svn-id: http://svn.terracotta.org/svn/ehcache@8487 b9324663-ca0f-0410-8574-be9b3887307d
ENG-493 system test for cache manager destroy with crash in the middle

git-svn-id: http://svn.terracotta.org/svn/ehcache@8488 b9324663-ca0f-0410-8574-be9b3887307d