Add logs, stdout and stderr to the allure-pytest-bdd report

[IvanBuruyane]

Context

[//]: # ( Describe the problem or feature in addition to a link to the issues ) Currently allure report for the pytest-bdd framework doesn't include logs, stdout and stderr created during test run. It makes hard to understand what was the root cause of the test failure. In order to fix this I simply added the code from the allure-pytest listener that adds logs, stdout and stderr to the report. Here's a screenshot from the report with logs:

Checklist

• [x] Sign Allure CLA
• [x] Provide unit tests

[CLAassistant]

All committers have signed the CLA.

[IvanBuruyane]

Is there anybody who can take a look at this PR? @veryhappythings @janza @middagj

[delatrie]

Hi, @IvanBuruyane !

Thank you for your contribution. That's a useful feature, but it should be covered with tests.

Please, add some tests. Here are links that might help you with that:

• Tests of a similar feature in pytest
• An example of how to test Allure Pytest-BDD