Use .yml.gz format to reduce space requirement from ~260Mb to ~17Mb for ml tests
Use .yml.gz format to reduce space requirement from ~260Mb to ~17Mb for ml tests

The size of temporary files is an issue on mobile platforms.

apavlenko/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,apavlenko/opencv