Tuesday night’s candidates’ forum in Ward 6 didn’t dissolve into a debate over Council President Martin Sweeney’s political future, as some had hoped. But the gathering at Antioch Baptist Church on Cedar Road did illuminate some serious discontent in the neighborhood, which includes Fairfax, University Circle, and Little Italy. After 12 years of Pat Britt, the councilwoman who appears to have been known mostly for not returning phone calls, people are fed up. …