MNK-5322 Don't assert anything until the store has been flushed

git-svn-id: http://svn.terracotta.org/svn/ehcache@7757 b9324663-ca0f-0410-8574-be9b3887307d
INT-2427: deleting RC branches

git-svn-id: http://svn.terracotta.org/svn/ehcache@7758 b9324663-ca0f-0410-8574-be9b3887307d