If the original file is missing, make it non-fatal
If the original file is missing, make it non-fatal

The external data code makes it hard to add a new test as the test
is used to generate the baseline. Make the missing original a status
message rather than a fatal error. This allows you to add a new test,
compile it, generate the baseline and then add it as we did before the
move the external data.

Change-Id: I7cf25270c59ec1055c9e4c37d9e328f9f696f236

mspark93/VTK,ashray/VTK-EVM,candy7393/VTK,hendradarwin/VTK,sumedhasingla/VTK,msmolens/VTK,demarle/VTK,biddisco/VTK,sumedhasingla/VTK,mspark93/VTK,SimVascular/VTK,sankhesh/VTK,johnkit/vtk-dev,berendkleinhaneveld/VTK,mspark93/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,johnkit/vtk-dev,johnkit/vtk-dev,hendradarwin/VTK,berendkleinhaneveld/VTK,berendkleinhaneveld/VTK,sumedhasingla/VTK,gram526/VTK,sankhesh/VTK,johnkit/vtk-dev,jmerkow/VTK,sankhesh/VTK,ashray/VTK-EVM,candy7393/VTK,ashray/VTK-EVM,SimVascular/VTK,jmerkow/VTK,candy7393/VTK,hendradarwin/VTK,msmolens/VTK,candy7393/VTK,sumedhasingla/VTK,berendkleinhaneveld/VTK,demarle/VTK,gram526/VTK,mspark93/VTK,johnkit/vtk-dev,gram526/VTK,SimVascular/VTK,demarle/VTK,biddisco/VTK,demarle/VTK,sankhesh/VTK,ashray/VTK-EVM,jmerkow/VTK,sumedhasingla/VTK,msmolens/VTK,mspark93/VTK,sankhesh/VTK,keithroe/vtkoptix,mspark93/VTK,SimVascular/VTK,johnkit/vtk-dev,ashray/VTK-EVM,mspark93/VTK,hendradarwin/VTK,hendradarwin/VTK,hendradarwin/VTK,gram526/VTK,jmerkow/VTK,SimVascular/VTK,msmolens/VTK,biddisco/VTK,gram526/VTK,keithroe/vtkoptix,sumedhasingla/VTK,msmolens/VTK,biddisco/VTK,sumedhasingla/VTK,ashray/VTK-EVM,keithroe/vtkoptix,candy7393/VTK,keithroe/vtkoptix,biddisco/VTK,SimVascular/VTK,ashray/VTK-EVM,demarle/VTK,sankhesh/VTK,demarle/VTK,candy7393/VTK,biddisco/VTK,keithroe/vtkoptix,ashray/VTK-EVM,sankhesh/VTK,msmolens/VTK,msmolens/VTK,keithroe/vtkoptix,demarle/VTK,msmolens/VTK,berendkleinhaneveld/VTK,biddisco/VTK,jmerkow/VTK,jmerkow/VTK,SimVascular/VTK,gram526/VTK,mspark93/VTK,candy7393/VTK,sumedhasingla/VTK,hendradarwin/VTK,demarle/VTK,jmerkow/VTK,candy7393/VTK,keithroe/vtkoptix,keithroe/vtkoptix,jmerkow/VTK,berendkleinhaneveld/VTK,johnkit/vtk-dev,gram526/VTK,gram526/VTK,SimVascular/VTK