Updated mediawiki/extensions
Project: mediawiki/extensions/BlueSpiceFoundation  5cadf407b9ce0e7dccdc24e2b3efdd4cad35a7c8

BSFileSystemHelper: Added small BS_CACHE_DIR support

* Added missing wgProfileOut
* Used DS instead of '/'
* Fixed DataDir/DataPath/CacheDir getter
* Added/Fixed some descriptions
* Added getCacheFileContent method
* Added path check for cache directory to hasTraversal method

BsFileSystemHelper is still limited

Change-Id: I005419f5ecdcb7a9d6192b3d85eddd4119b8585b