Fix TestFieldDataSerialization.
Fix TestFieldDataSerialization.

Test was failing on some dashboards because array sizes were
being unpacked into the space of the array names.

Change-Id: I233f947738c1c7c0cc47bf485f1f437f7e54af79

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