Traci Braxton, the sister of singers, Toni and Tamar Braxton, has died at the age of 50.   Traci, who appeared on the reality show ‘Braxton Family Values’ with her parents and siblings, died on Friday, March 11.     Traci’s husband Kevin Surratt disclosed the sad news to TMZ,  saying: “We have come to a time where we must inform the public that after a year of privately undergoing a series of treatment for Esophageal cancer our beloved Traci …