Allure does not show failed steps message and traceback for steps for reports generated by allure-behave

[mchapko]

Describe the bug Allure does not show failed steps message and traceback for steps for reports generated by allure-behave. Information is for message and trace nodes on step level are visible in json files generated with allure, but its not visible in the report page

To Reproduce Steps to reproduce the behavior: Run the behave tests using allure formatter where one of the steps will throw exception or cause traceback Generate allure report. Verify the exception/traceback is shown in Test Case for last occured error as well as is visible in expandable step details.

Expected behavior step exceptions and tracebacks shall be visible in expandable window after clicking the failed step.

Environment (please complete the following information):

Allure version	2.4.0
Testframework	python/behave