During a time when segregation limited opportunities for Black business owners, one man in Mamou refused to let closed doors define his future.For Black History Month, we share the story of Jimmy Thomas, a longtime businessman who built his legacy one barrel of gas at a time.On a corner in Mamou sits more than just a mechanic shop, it sits a piece of local history.At 85 years old, Jimmy Thomas is still running the business he has owned for more …