ADD: test for "convertx --labels"


git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5237 42a5c34f-2066-0410-bec5-ba365beb4995
ADD: copy data class from floating image


git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5238 42a5c34f-2066-0410-bec5-ba365beb4995