[TASK] Use name-resolution instead of strings where possible: 17

(miscellaneous)

Use name-resolution with ...::class instead of strings where possible.
(needs PHP 5.5, which is meanwhile required for master)

Change-set Iedbb896607adddce2b23ab67f990fa2296c0d1bb first introduced
usage of ::class in master. We now add it in various more places.

Resolves: #63477
Releases: master
Change-Id: Ifa4022cefef28dcfc4fae18e8aa003f6ade21cb3
Reviewed-on: http://review.typo3.org/35091
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Alexander Opitz <opitz.alexander@googlemail.com>
Tested-by: Alexander Opitz <opitz.alexander@googlemail.com>