fix: Fixed naming errors in unit tests

This patch adresses two types of common error:
- File names with incorrect capital letters
- File names with mistakenly replace of "_" by camel case

Signed-off-by: Sebastian Niemann <niemann@sra.uni-hannover.de>
fix: Correcting file names (Readding files)

See previous commit for more details.

Signed-off-by: Sebastian Niemann <niemann@sra.uni-hannover.de>