Fix memory leak in TestAMRReadWrite
Fix memory leak in TestAMRReadWrite

This fixes a memory leak from the fname string in the
CreateTestAMR test.

Change-Id: Idd6d1aaf1205adcc97581e175534497f33905840

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