[TASK] Add extbase mapping configuration

Resolves: #59096
Releases: master
Change-Id: I70ba997b09acf7c981551a174d62b21dcb165798
Reviewed-on: http://review.typo3.org/30388
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>