[NRRPLT-8128] Test coverage update Python 3.8

* [NRRPLT-8127] make reports with function
* [NRRPLT-8127] setup manual coverage line
* [NRRPLT-0000] docstrings and pylint fix for ci directory download python script

Approved-by: Vahid Zolfaghari
Approved-by: Krzysztof Lebioda