Add next code to register mock and objec with one call

[dzmitry-lahoda]

This speeds up registering custom mock in base class of test (e.g. MyRepository) and then resolving mock in child to tune base behavior:

  public static class UnityMoqContainerExtensions
    {
        public static IUnityContainer RegisterMock<T>(this IUnityContainer self, Mock<T> mock)
            where T:class
        {
            return self.RegisterInstance(mock).RegisterInstance(mock.Object);
        }
  }