Primitives without default parameters in `featuretools.primitives` module break `get_valid_primitives` default code path

[rwedge]

A current limitation to get_valid_primitives is that it expects every primitive returned by get_transform_primitives and get_aggregation_primitives. It will try to initialize a primitive without specifying an args, and doesn't handle the case where positional args are required. This adds a requirement that any primitive added to featuretools.primitives via the featuretools_primitives entry point must have default values set for any init parameters.

It would be good to update get_valid_primitives to handle primitives that require positional args, either by excluding them from the default search when it encounters them or to include them anyway in some fashion.