TEST: use a single cmake var for referencing large inputs

Testing/Applications/DisparityMap/CMakeLists.txt

Testing/Applications/Projections/CMakeLists.txt

Testing/Code/BasicFilters/CMakeLists.txt

Testing/Code/Common/CMakeLists.txt

Testing/Code/DisparityMap/CMakeLists.txt

Testing/Code/IO/CMakeLists.txt

Testing/Code/Projections/CMakeLists.txt

Testing/Code/Radiometry/CMakeLists.txt

Testing/Code/UtilitiesAdapters/CMakeLists.txt