Ignite Cassandra integration doesn't correctly handle Inet4Address and Inet6Address objects

PropertyMappingHelper.getCassandraType correctly handles the inet <-> java.net.InetAddress type, but not it's sub classes of java.net.Inet4Address or java.net.Inet6Address.  As there is no standard way to directly create an InetAddress, this makes it very difficult to use an inet data types for keys in cassandra.

In general, shouldn't Cassandra types handle any subclasses of supported classes?