HH-47074 new stages logging
Merge remote-tracking branch 'origin/HH-47074' into EXP-12780
release 2.21.16 [an.sumin@hh.ru]
HH-47815 fix logging levels
Merge remote-tracking branch 'origin/HH-47815' into EXP-12789
release 2.21.17 [an.sumin@hh.ru]
extend /version info
add handler tests
fix tests with lxml >= 3
append data kwarg in delete requests to query string instead of body
add new MicroHandler test
add simple xsl cache test
remove some dead code
add test for custom 404 and fix error pages
add asciify_url test