[TASK] Get rid of old classnames like t3lib_...

Change-Id: I4e7d41936b85c76c73dce504ffc51a412a1a5429
Resolves: #60584
Releases: master
Reviewed-on: http://review.typo3.org/31837
Reviewed-by: Nico de Haen <mail@ndh-websolutions.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>