FIX: Exclude vtkRenderingVolumeOpenGLNew from vtkOpenGL kit

This fixes the issue that when the vtkOpenGL kit is turned ON,
the vtkRenderingVolumeOpenGLNew module should not be built.

Change-Id: Icca73fa738567a0fd37e0e498d82d4b99d08b253
Merge topic 'exclude_new_volumerendering_kit' into master

d44d3e83 FIX: Exclude vtkRenderingVolumeOpenGLNew from vtkOpenGL kit