Provide the clean up at the tests end

[PopovaPolina]

Write a method which will finalize the tests scenario (even interrupted by user) and delete all artifacts created by the tests (users, channels and so on).

[Suprun]

Tasks

@BehindLoader

• Fix check_with_retries method
• Catch incorrect auth data

@ABSLord

• Improve chat removing logic

pool

• Expanse setup and tear_down method
• Check all test cases performance
• Refactoring