VirtualMachineImages doesn't expose list functionality supported on VirtualMachineImagesInner

VirtualMachineImages supports retrieving a single image or listing by region but this is very general. Instead the list (search) functionality found on VirtualMachineImagesInner should be exposed to allow the user to find multiple image. Otherwise you have to resort to using reflection or rebuilding the library to expose these (unless there is another way I can't find).