test for market_manager

[Ravleen-Solulab]

This PR contains test scripts for market_manager_abci.

[Adamantios]

Please update the hashes and cover the following:

Name                                                                                     Stmts   Miss  Cover   Missing
--------------------------------------------------------------------------------------------------------------------------------------------------------

packages/valory/skills/market_manager_abci/rounds.py                                        44      4    91%   57-58, 68, 85

Moreover, please add the market_manager_abci and the check_stop_trading_abci (which tests were merged just now from #319) here:

trader/tox.ini

Lines 102 to 105 in b04a826

	[commands-packages]
	commands =
	{[commands-base]commands}
	pytest -rfE {env:SKILLS_PATHS}/decision_maker_abci/tests --cov={env:SKILLS_PATHS}/decision_maker_abci --cov-report=xml --cov-report=term --cov-report=term-missing --cov-config=.coveragerc {posargs}

[Ravleen-Solulab]

Could you please tell me specifically what did I miss?

[Adamantios]

Could you please tell me specifically what did I miss?

Lines 57-58, 68, 85 are not covered in rounds.