ATLANTA — The Atlanta Falcons found a replacement for John Abraham on Wednesday by reaching an agreement with free-agent defensive end Osi Umenyiora on a two-year, $8.5 million contract. The Falcons released the 34-year-old Abraham, the team leader with 10 sacks in 2012, on March 1, the same day they also released running back Michael Turner and cornerback Dunta Robinson. The team replaced Turner by signing Steven Jackson to a three-year, $12 million deal March 14.