Merge pull request #3136 from owncloud/mount-cleanup

apps/files_sharing/lib/cache.php

apps/files_sharing/lib/sharedstorage.php

lib/files/cache/cache.php

lib/files/cache/storage.php

lib/files/filesystem.php

lib/files/mount/manager.php

lib/files/mount/mount.php

lib/files/storage/common.php

lib/files/storage/storage.php

lib/files/view.php

lib/public/share.php

lib/util.php

tests/lib/files/mount.php

tests/lib/files/mount/manager.php

tests/lib/streamwrappers.php