STYLE: Apply kwstyle to Modules/Core 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 test.

Change-Id: Ic98e121f206c47a9095c91403c84b12b27b01607
Merge topic 'StyleForCoreTests'

8f6dea0 STYLE: Apply kwstyle to Modules/Core tests