Add test for colour bar glyph get spectrum function. https://tracker.physiomeproject.org/show_bug.cgi?id=3957
Add test for colour bar glyph get spectrum function. https://tracker.physiomeproject.org/show_bug.cgi?id=3957

hsorby/zinc,hsorby/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc