STYLE: Apply kwstyle to some 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: I23b7c407b2f8406c52ec2fc536dcb7c6fe9af0ca
Merge topic 'StyleTestsCleanup1'

a4a0090 STYLE: Apply kwstyle to some tests