BUG: updating tests to fit new changes under tubemerge module
BUG: updating tests to fit new changes under tubemerge module

sumedhasingla/TubeTK,LucasGandel/TubeTK,aylward/ITKTubeTK,sumedhasingla/TubeTK,matthieuheitz/TubeTK,cdeepakroy/TubeTK,thewtex/TubeTK,thewtex/TubeTK,KitwareMedical/ITKTubeTK,KitwareMedical/TubeTK,KitwareMedical/ITKTubeTK,KitwareMedical/ITKTubeTK,thewtex/TubeTK,aylward/ITKTubeTK,KitwareMedical/ITKTubeTK,matthieuheitz/TubeTK,LucasGandel/TubeTK,KitwareMedical/TubeTK,matthieuheitz/TubeTK,matthieuheitz/TubeTK,aylward/ITKTubeTK,KitwareMedical/TubeTK,sumedhasingla/TubeTK,aylward/ITKTubeTK,KitwareMedical/TubeTK,LucasGandel/TubeTK,LucasGandel/TubeTK,sumedhasingla/TubeTK,cdeepakroy/TubeTK,thewtex/TubeTK,cdeepakroy/TubeTK,cdeepakroy/TubeTK