BUG: GenerateExpertAutomatedRegistrationTestData FactoryRegistration.

The executable needs to call the ITK FactoryRegistration function to
get the ImageIO factories registered hen in Slicer.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21751 3bd1e089-480b-0410-8dfb-8563597acbee