Merge pull request #3217 from avdmitry:samples_cpp_data

diff --cc doc/tutorials/core/discrete_fourier_transform/discrete_fourier_transform.rst
Simple merge

diff --cc doc/tutorials/introduction/display_image/display_image.rst
Simple merge

diff --cc samples/cpp/tutorial_code/features2D/AKAZE_match.cpp
Simple merge

diff --cc samples/tapi/hog.cpp
Simple merge