[BUGFIX] #5195 Unit test failure for TranslatorRegistry in 6.2

Change-Id: Ie2213feaccfe6ccb3fff2e96dbc1f0fa0ba4696f
Reviewed-on: http://review.typo3.org/35168
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>