ENG-14, ENG-13 Further validation, cut down on stats logging when extension is not registered with cache.

git-svn-id: http://svn.terracotta.org/svn/ehcache@7727 b9324663-ca0f-0410-8574-be9b3887307d
DEV-9890 && DEV-9937 && API-21: Ehcache rest agent integration testing
* enforcing attributes do exist
* better exception handling


git-svn-id: http://svn.terracotta.org/svn/ehcache@7728 b9324663-ca0f-0410-8574-be9b3887307d
DEV-9890 && DEV-9937: Ehcache rest agent integration testing
* testing /tc-management-api/agents/cacheManagers
* testing /tc-management-api/agents/cacheManagers/caches
* testing /tc-management-api/agents/cacheManagers/caches/configs
* testing /tc-management-api/agents/cacheManagers/configs


git-svn-id: http://svn.terracotta.org/svn/ehcache@7729 b9324663-ca0f-0410-8574-be9b3887307d
Merge of r7727, ENG-13


git-svn-id: http://svn.terracotta.org/svn/ehcache@7730 b9324663-ca0f-0410-8574-be9b3887307d