The exceptions show now the affected class that does not
implement the required interface. Where possible, the FQCN
in the exception message string was replaced with the shorter
::class syntax.

Resolves: #76187
Releases: master, 7.6
Change-Id: Id2c290a0cf29bdec5da504a8959996bb747f1c27
Reviewed-on: https://review.typo3.org/48115


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>