STYLE: Apply kwstyle to Modules/Segmentation tests

KWStyle was not checking tests. However, the git hook for KWStyle did
check tests if they were modified. This topic cleans itk tests and
reduces developer frustration when committing changes to tests.

Change-Id: I7436e2b6427e1c5f97ce52f32a90aa62e314f8b2
Merge topic 'StyleForSegmentation'

304af0a STYLE: Apply kwstyle to Modules/Segmentation tests