[BUGFIX] Follow-up: Fix fileinfo property mapping in ResourceStorage

Adjust unittest to changed conditions.

Change-Id: Ia885ba544a159cb1666464cece30c3e6ea3558b6
Fixes: #49386
Releases: 6.2, 6.1, 6.0
Reviewed-on: https://review.typo3.org/23723
Reviewed-by: Ernesto Baschny
Tested-by: Ernesto Baschny