HH-48514 add more handler tests
HH-48514 add new MicroHandler test
HH-48514 set MicroHandler group name
HH-48514 remove some dead code
Merge remote-tracking branch 'origin/HH-48514' into EXP-12994
release 2.21.23 [an.sumin@hh.ru]
append data kwarg in delete requests to query string instead of body
add simple xsl cache test
add test for custom 404 and fix error pages
add asciify_url test
service_mock improvements