Major Description
If I parse a protocol p using avro.protocol.parse, which defines "namespace": "ns" and then retrieve a child schema s from the protocol's proto.types (or proto.types_dict), then s does not have its namespace set (to ns), even if p has a namespace.
This is particularly problematic if I'm using s to write out an avro file intended to be read by a specific-type reader, because the file header will claim to be objects of type s (not ns.s, as expected).
I've attached two patches: one that makes sure that the namespace property of protocol types is set to the default namespace of the protocol when not otherwise set.
The second patch ensures that the namespace is not rendered into JSON when a default protocol specifies the right value already.