[TAB-4789] DfltSamplerRepositoryServiceV2: Fix memory leak

git-svn-id: http://svn.terracotta.org/svn/ehcache@9520 b9324663-ca0f-0410-8574-be9b3887307d
[TAB-4789] DfltSamplerRepositoryServiceV2: Fix memory leak

git-svn-id: http://svn.terracotta.org/svn/ehcache@9521 b9324663-ca0f-0410-8574-be9b3887307d