The Russian beverage company Oasis Beverages has acquired the Pabst Brewing Company, maker of the Pabst Blue Ribbon beer brand, for an undisclosed sum. The partner of Oasis Beverages in the transition is TSC Consumer Partners, an American private equity consumer products company that will take a minority stake in the business. In addition to Pabst Blue Ribbon label, Pabst Brewing produces brands such as Colt 45, Old Milwaukee and …