Zend_Cache: TwoLevels backend properties visibility is changed to 'protected'. ZF-8430.
Zend_Cache: TwoLevels backend properties visibility is changed to 'protected'. ZF-8430.

git-svn-id: abaeb2b3ba5a94ed391a9405ad7d63d0414021c9@19787 44c647ce-9c0f-0410-b52a-842ac1e357ba

grzana12/ZendFramework,grzana12/ZendFramework,sandsmedia/zf,sandsmedia/zf,grzana12/ZendFramework,sandsmedia/zf,grzana12/ZendFramework