Revert last commit to UnitTestFunctionParser.cxx.
Revert last commit to UnitTestFunctionParser.cxx.

Change-Id: I17349dbdb8f05a812237aa3bc089b87787997c9a

keithroe/vtkoptix,gram526/VTK,candy7393/VTK,sankhesh/VTK,mspark93/VTK,ashray/VTK-EVM,sumedhasingla/VTK,demarle/VTK,keithroe/vtkoptix,demarle/VTK,sankhesh/VTK,sumedhasingla/VTK,sankhesh/VTK,ashray/VTK-EVM,demarle/VTK,jmerkow/VTK,hendradarwin/VTK,mspark93/VTK,keithroe/vtkoptix,candy7393/VTK,candy7393/VTK,demarle/VTK,jmerkow/VTK,msmolens/VTK,sumedhasingla/VTK,SimVascular/VTK,keithroe/vtkoptix,hendradarwin/VTK,msmolens/VTK,jmerkow/VTK,hendradarwin/VTK,SimVascular/VTK,jmerkow/VTK,jmerkow/VTK,SimVascular/VTK,ashray/VTK-EVM,SimVascular/VTK,SimVascular/VTK,gram526/VTK,mspark93/VTK,msmolens/VTK,gram526/VTK,msmolens/VTK,demarle/VTK,mspark93/VTK,msmolens/VTK,hendradarwin/VTK,demarle/VTK,candy7393/VTK,keithroe/vtkoptix,mspark93/VTK,candy7393/VTK,mspark93/VTK,sankhesh/VTK,msmolens/VTK,msmolens/VTK,ashray/VTK-EVM,sankhesh/VTK,sankhesh/VTK,gram526/VTK,sumedhasingla/VTK,SimVascular/VTK,sumedhasingla/VTK,mspark93/VTK,hendradarwin/VTK,keithroe/vtkoptix,mspark93/VTK,msmolens/VTK,jmerkow/VTK,keithroe/vtkoptix,candy7393/VTK,gram526/VTK,sankhesh/VTK,jmerkow/VTK,sumedhasingla/VTK,gram526/VTK,ashray/VTK-EVM,demarle/VTK,candy7393/VTK,gram526/VTK,SimVascular/VTK,sankhesh/VTK,sumedhasingla/VTK,hendradarwin/VTK,hendradarwin/VTK,jmerkow/VTK,sumedhasingla/VTK,SimVascular/VTK,ashray/VTK-EVM,ashray/VTK-EVM,gram526/VTK,ashray/VTK-EVM,keithroe/vtkoptix,demarle/VTK,candy7393/VTK