Add ability to modify onnx recursion limit.

[michaelgsharp]

Right now we are setting the onnx recursion limit when loading models to 100, but there is no way to modify this value other than changing the source code and rebuilding. This value was originally 10 but that caused some issues for end users so it was changed to 100, but if users again run into the issue there is no way for them to fix it themselves.

We need to add the ability for users to specify this value so when they run into issues they can change it themselves.

[Crabzmatic]

Hi, are you referring to this method? I quickly skimmed through the code and couldn't find a place where we have the onnx recursion limit.

[michaelgsharp]

Its here. Essentially it would need to be added as a parameter to the constructor with a default value of 100, and then that would have to be back propagated to all the methods that call the constructor until we get to the method used by the user (ApplyOnnxModel). It will also need to be added to the saved model, and that is where the difficulty may be. I am not sure if we try to load the ONNX model first, or get the info from the ML.NET model first (It's probably a bit of both). If we load the ONNX model before we load the saved recursion limit we will have to see how hard it would be to reorder that. It may just work though, I haven't looked.