HH-44881 raise exception with original traceback in service_mock
HH-44881 add copy as curl tests
Merge remote-tracking branch 'origin/HH-44881' into EXP-11792
release 2.20.12 [an.sumin@hh.ru]
new debug with Jinja2
new stages, log request_time instead of app total time
add tests for debug page
add coverage to tests run
improve frontik.testing
add new tests