BUG: Update CLI test driver to ensure registration of ITKv4 IO Factories

See #2813 - http://www.na-mic.org/Bug/view.php?id=2813

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21691 3bd1e089-480b-0410-8dfb-8563597acbee