Mark parent step as failed if child step failed with soft check (fix #827)#854

sharovd wants to merge 3 commits intoallure-framework:masterallure-framework/allure-python:masterfrom

sharovd:fix-827-soft-check-nested-step-failsharovd/allure-python:fix-827-soft-check-nested-step-failCopy head branch name to clipboard