This configuration isn't used for anything in the memory backend so default it to none so that it doesn't need to be provided (since it's not used). Change-Id: I9e333aec52b697ebd3d5b1f4ec14d810e99bab19
This configuration isn't used for anything in the memory backend so default it to none so that it doesn't need to be provided (since it's not used). Change-Id: I9e333aec52b697ebd3d5b1f4ec14d810e99bab19