[BUGFIX] Add missing logger names

A logger name is mandatory to configure a particular logger.
The convention is use __CLASS__ as the logger name when
instanciating a new logger using LogManager->getLogger().

Resolves: #54909
Releases: 6.2, 6.1
Change-Id: I5dbda770ec92fd75c3aff9ed89c68c5666669b07
Reviewed-on: https://review.typo3.org/26755
Reviewed-by: Markus Klein
Reviewed-by: Wouter Wolters
Reviewed-by: Steffen Müller
Tested-by: Steffen Müller