* clean npr functions of useless initializations (speed-up)

* photo: remove unnecessary code

To investigate sporadic failures of Features2d_FLANN_Auto.regression test.

This commit readd ${VA_LIBRARIES} ${VA_INTEL_LIBRARIES}
that was missed in commit 2200e13c

    diff --git a/samples/va_intel/CMakeLists.txt b/samples/va_intel/CMakeLists.txt
    -    ocv_target_link_libraries(${the_target} ${OPENCV_LINKER_LIBS} ${OPENCV_VA_INTEL_SAMPLES_REQUIRED_DEPS} ${VA_LIBRARIES} ${VA_INTEL_LIBRARIES})
    +  ocv_target_link_libraries(${tgt} ${OPENCV_LINKER_LIBS} ${OPENCV_VA_INTEL_SAMPLES_REQUIRED_DEPS})

- missing 'module'
- fixed '\r\n' EOL handling (blocked by '$' regex)

Signed-off-by: Wu, Zhiwen <zhiwen.wu@intel.com>
Signed-off-by: Li Peng <peng.li@intel.com>

  * loosen some test threshold mainly for integer types
  * use relative error for floating points result
  * avoid division by zero by following the comment
  * fix the indentation

OpenCV 3.4.1

Signed-off-by: Li Peng <peng.li@intel.com>

* ave pooling ocl fix

support the padded area control in ave pooling
Signed-off-by: Li Peng <peng.li@intel.com>

* warning fix: ununitialized field

FFmpeg: 3.3.4 -> 3.4.2
LibVPX: 1.6.1 -> 1.7.0
OpenH264: 1.6.0 -> 1.7.0