Update TestTreeHeatmapItem for recent changes to collapse/expand
Update TestTreeHeatmapItem for recent changes to collapse/expand

This change gets the test passing again on our VS71 nightly builds.

Change-Id: Ie8829cffde66fbb636c30eabc72789420cf4e60b

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