[CLEANUP] #5198 Make setUp and tearDown protected

Change-Id: If24dba2a0524d2e0dae409ec665dec30baebbce5
Reviewed-on: http://review.typo3.org/35451
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>