BUG: New baselines for 4 BFit BSpline tests

The baselines of the following tests have been changed:

BRAINSFitTest_BSplineScaleRotationHeadMasksUShort.result.nii.gz
BRAINSFitTest_BSplineScaleRotationHistogramHeadMasks.result.nii.gz
BRAINSFitTest_BSplineScaleRotationRescaleHeadMasks.result.nii.gz
BRAINSFitTest_ROIBSpline.result.nrrd