Update the scalar bar build time.
Update the scalar bar build time.

The BuildTime member is not being updated when the
scalar bar layout is recalculated, causing layouts
to be recomputed every time the bar is rendered.

Change-Id: I79615dfee885cf13b64370bd53dd6bc9485980cd

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