Cuba is set to soon receive two Russian cargoes of crude and diesel amid the U.S. energy blockade that has caused an unprecedented power crisis in the country. The shipments from Russia, which considers Cuba as one of few “friendly countries”, could test the U.S. resolve to continue isolating energy shipments for the island. If the tankers en route to Cuba do arrive in the coming days, they would be the first Russian oil and fuel shipments to the country this year. The tanker Anatoly Kolodkin, sanctioned by the U.S.,…