A federal judge’s formal installation sometimes resembles a roast.That proved to be impossible with Judge Michael Y. Scudder of the 7th U.S. Circuit Court of Appeals.“As much as I would enjoy poking fun at Michael today, there’s just not a lot of dirt there,” Scudder’s brother, John, told the well-wishers who gathered in the ceremonial courtroom at the Dirksen Federal Courthouse on Monday for Scudder’s investiture.The only incident that even came close, John said, was the time 10-year …