[TASK] Use BackendUtility to generate the URI

Change-Id: I15c4657cf8f46629aaee9497590d65347df63863
Releases: 3.0
Resolves: #61286
Reviewed-on: http://review.typo3.org/32537
Reviewed-by: Fabien Udriot <fabien.udriot@ecodev.ch>
Tested-by: Fabien Udriot <fabien.udriot@ecodev.ch>