Add support of Python3 IPv4Address and IPv6Address for inet types

I'm trying to insert data to a table with UDT, which is composed of a field of type FROZEN<SET<inet>>.

The object I pass to the driver is an instance of a class that reflects the UDT structure, having an attribute of same name and of type set{ipaddress.IPv4Address}.

When I try to insert, I get the following error :

{{TypeError: Received an argument of invalid type for column "xxxxxxx". Expected: <class 'cassandra.io.libevreactor.xxxxxxxx'>, Got: <class 'xxxxxxxx'>; (argument of type 'IPv4Address' is not iterable)
}}

Works fine if I switch my object to be composed of a simple set of strings, but that breaks the logic in rest of the app.

Thanks