ENH: Backwards compatible FixedParameters

This patch provides alternatives for both
defining the m_FixedParameters of a transfor
as either the old-style ParametersType or
preferably the new-style FixedParametersType
when it is available in ITK.

Prepare for post ITK4.8 TransformFix

This patch makes Slicer prepared for future changes to
ITK that can not be backwards compatible.

http://review.source.kitware.com/#/c/19921/

From: Hans Johnson <hans-johnson@uiowa.edu>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@24338 3bd1e089-480b-0410-8dfb-8563597acbee