MNK-5657 MNK-5670 :  Multiple Management Agents test failures 
* more permgen, more heap, less problems

git-svn-id: http://svn.terracotta.org/svn/ehcache@8315 b9324663-ca0f-0410-8574-be9b3887307d
Tag ehcache-2.7.5 from 4.0.5-rc branch

git-svn-id: http://svn.terracotta.org/svn/ehcache@8316 b9324663-ca0f-0410-8574-be9b3887307d