Last year, in the middle of an energy crunch, European governments called on their citizens to consume less energy. They also lashed out at Big Oil for making billions from the squeeze. Now, Big Oil is the one calling for a reduction in energy consumption. Essentially, supermajors have suggested that people should use less of their products. But they don't want to slash production. The seemingly paradoxical message came out earlier this week from a conference in Vienna, where OPEC leaders met with their Big Oil counterparts from BP, Shell, and…