The recently announced partnership between Hertz and Amazon Autos will make it easier for rental car companies to offload their own cars directly to consumers, but it could cut into a historical source of profit for car dealerships, auto industry analysts said.The announcement that the car rental company would be teaming up with the e-commerce giant sent Hertz shares soaring. Hertz already sells most of its fleet directly to consumers — it lists them on its own website and on others, and sells them on Carva ...