A lawyer who was convicted of obstructing justice in a federal investigation and filing a false income tax return and subsequently sentenced to seven months in prison should be disbarred, an attorney-discipline panel has urged.The Illinois Attorney Registration & Discipline Hearing Board suggested the sanction on Thursday for 51-year-old Bradley F. Aubel of Libertyville, who in January 2013 was suspended on an interim basis and until further order of the court in connection with the evidence against him at the time of …