Fixing mnk6104

git-svn-id: http://svn.terracotta.org/svn/ehcache@8813 b9324663-ca0f-0410-8574-be9b3887307d
MNK-6090 Slow down test ... ARC auto balance needs time to see moving averages

git-svn-id: http://svn.terracotta.org/svn/ehcache@8814 b9324663-ca0f-0410-8574-be9b3887307d