add c++ and python OV benchmark_app support and other improvements
Created by: nberezina
Fix bug with TF run from config Join requirements.txt for linux and windows Remove model_converter Improvements in logging and timeout Add support of OpenVINO benchmark_apps - python and c++
This is a copy of pull request https://github.com/itlab-vision/dl-benchmark/pull/278 with review remarks applied. PR is created from another branch to unblock our fork's develop for merge. Sorry for inconvenience. Please, review.