BUGFIX: Correct indexing in Coarsen()
BUGFIX: Correct indexing in Coarsen()

Correct the indexing for the YZ and XZ planes
s.t. the correct attributes, i.e., the spacing
and bounds, are updated.

ashray/VTK-EVM,jmerkow/VTK,SimVascular/VTK,keithroe/vtkoptix,sumedhasingla/VTK,hendradarwin/VTK,msmolens/VTK,ashray/VTK-EVM,hendradarwin/VTK,biddisco/VTK,candy7393/VTK,mspark93/VTK,biddisco/VTK,gram526/VTK,keithroe/vtkoptix,cjh1/VTK,sankhesh/VTK,berendkleinhaneveld/VTK,biddisco/VTK,msmolens/VTK,gram526/VTK,keithroe/vtkoptix,demarle/VTK,hendradarwin/VTK,collects/VTK,candy7393/VTK,gram526/VTK,sankhesh/VTK,candy7393/VTK,aashish24/VTK-old,gram526/VTK,jmerkow/VTK,demarle/VTK,berendkleinhaneveld/VTK,aashish24/VTK-old,jmerkow/VTK,jmerkow/VTK,hendradarwin/VTK,johnkit/vtk-dev,ashray/VTK-EVM,collects/VTK,keithroe/vtkoptix,ashray/VTK-EVM,sumedhasingla/VTK,msmolens/VTK,aashish24/VTK-old,aashish24/VTK-old,keithroe/vtkoptix,berendkleinhaneveld/VTK,mspark93/VTK,sumedhasingla/VTK,hendradarwin/VTK,jmerkow/VTK,candy7393/VTK,keithroe/vtkoptix,cjh1/VTK,candy7393/VTK,msmolens/VTK,ashray/VTK-EVM,SimVascular/VTK,jmerkow/VTK,demarle/VTK,gram526/VTK,johnkit/vtk-dev,ashray/VTK-EVM,mspark93/VTK,SimVascular/VTK,biddisco/VTK,cjh1/VTK,biddisco/VTK,SimVascular/VTK,johnkit/vtk-dev,sumedhasingla/VTK,msmolens/VTK,cjh1/VTK,demarle/VTK,ashray/VTK-EVM,collects/VTK,sankhesh/VTK,biddisco/VTK,sumedhasingla/VTK,mspark93/VTK,keithroe/vtkoptix,mspark93/VTK,candy7393/VTK,msmolens/VTK,sumedhasingla/VTK,johnkit/vtk-dev,demarle/VTK,candy7393/VTK,collects/VTK,berendkleinhaneveld/VTK,berendkleinhaneveld/VTK,johnkit/vtk-dev,ashray/VTK-EVM,sumedhasingla/VTK,hendradarwin/VTK,berendkleinhaneveld/VTK,collects/VTK,SimVascular/VTK,demarle/VTK,sumedhasingla/VTK,biddisco/VTK,mspark93/VTK,msmolens/VTK,hendradarwin/VTK,cjh1/VTK,sankhesh/VTK,gram526/VTK,johnkit/vtk-dev,sankhesh/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,candy7393/VTK,mspark93/VTK,cjh1/VTK,keithroe/vtkoptix,aashish24/VTK-old,jmerkow/VTK,jmerkow/VTK,johnkit/vtk-dev,demarle/VTK,msmolens/VTK,aashish24/VTK-old,sankhesh/VTK,SimVascular/VTK,demarle/VTK,gram526/VTK,collects/VTK,sankhesh/VTK,SimVascular/VTK,mspark93/VTK,gram526/VTK,sankhesh/VTK