For the third straight year, optimism about mergers and acquisitions is up, a survey by Dykema, Gossett PLLC says. About 60 percent of the survey’s 190 respondents said that the market will be stronger in the next 12 months than it was in the last 12. That’s an increase from last year’s 44 percent and way up from the 16 percent in 2008, the lowest percentage in the survey’s 10-year history. The survey queried primarily lawyers, business executives and commercial and investment bankers. In a …