message: bindings: opencv: properly identify opencv version 2
  The define for opencv version 2 was set for all versions less than 3.4.1. The correct define should be set only for versions less than 3.0.0
diff: @@ -13,7 +13,11 @@ if(OPENCV_FOUND OR
  OPENCV_CORE_FOUND) # we check for this because the OpenCVConfig.cmake(v2.4.9.1) used on dragonboards fails to set OPENCV_FOUND
  if(OpenCV_VERSION VERSION_LESS "3.4.1")
  message(WARNING "The dnn example is only available for OpenCV version >= 3.4.1! This example won't be built!")
  +
  + if(OpenCV_VERSION VERSION_LESS "3.0.0")
  + message(STATUS "USING OPENCV Version 2")
  add_definitions(-DOPENCV2)
  + endif(OpenCV_VERSION VERSION_LESS "3.0.0")
  if(WIN32)
  include(FindOpenSSL)
  