Add package unit tests into CI

[vyahello]

Please follow AC for the task.

Basically, it should cover the following logic:

• Build state: Test the code with static analysis and unit tests on code itself
• Build state: If first passed then we build a package via python setup.py install
• Test stage: Then we should verify if the package works, it's version/name/flags etc.
• Create reusable config parts so those could be used for both stages

[4lovi4]

Hi @vyahello may I try a shot to resolve the issue? With naive PR

[vyahello]

Hey @4lovi4, sure go ahead, I appreciate your efforts. I've left a few comments before proceeding with the request, please have a look.