COMP: Copy-paste error

CID 1080816: In itkPeriodicBoundaryConditionTest(int, char **): A
copied piece of code is inconsistent with the original (CWE-398)

Change-Id: I2ec8d295afed8f21ebd2f550920d3b6d22b5e8e3
Merge topic 'Coverity_itkPeriodicBoundaryConditionTest'

eb59a2b COMP: Copy-paste error