HH-48861 remove old App and FileMappingDispatcher
Merge remote-tracking branch 'origin/HH-48861' into EXP-13125
release 2.22.0 [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