Arnold Renderer : Avoid deprecated `AiRender()` method
Arnold Renderer : Avoid deprecated `AiRender()` method

And marvel at the unnecessary complexity of the new and improved API.

hradec/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,hradec/gaffer,hradec/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,hradec/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,hradec/gaffer