A former suburban Chicago mayor in failing health is set to be released from federal prison just three months into a one-year sentence for taking $5,000 to help a red-light camera company.U.S. District Judge Thomas M. Durkin of the Northern District of Illinois on Thursday ordered former Crestwood Mayor Louis Presta’s release from Federal Medical Center-Kentucky in Lexington. A petition from Presta’s lawyers said his already poor health had declined rapidly since reporting to prison in late June.Presta’s …