Add GPU models in seperate folder, only old models are supported and they were replaced to make the CPU interface work.

This solves the undesired consequence of breaking the GPU interface.

modules/gpu/doc/object_detection.rst

@@ -264,7 +264,7 @@ Loads the classifier from a file. The previous content is destroyed.
 
 .. ocv:function:: bool gpu::CascadeClassifier_GPU::load(const string& filename)
 
-    :param filename: Name of the file from which the classifier is loaded. Only the old ``haar`` classifier (trained by the ``haar`` training application) and NVIDIA's ``nvbin`` are supported for HAAR and only new type of OpenCV XML cascade supported for LBP.
+    :param filename: Name of the file from which the classifier is loaded. Only the old ``haar`` classifiers (trained by the ``haar`` training application) and NVIDIA's ``nvbin`` are supported for HAAR and only new type of OpenCV XML cascade supported for LBP. The working haar classifiers can be found under ``data\haarcascades_GPU\``.
 
 
 gpu::CascadeClassifier_GPU::release