Explicitly registering Portable ClassDefinitions fails with multiple PortableFactories and overlapping classIds

[sancar]

see following issue description
hazelcast/hazelcast#16820

Java fix
hazelcast/hazelcast#16831

[mdumandag]

Also, there is a bug here. https://github.com/hazelcast/hazelcast-python-client/blob/master/hazelcast/serialization/service.py#L85 . It should be cd.class_id instead of cd because the dictionary keys are class ids not class defs. Python client does not raise the exception because of this bug. This should be fixed too.