[rust] Derive Deserialize produces invalid Name struct

The Name struct derives the trait Deserialize, which allows it to be constructed from a JSON as shown in this test: https://github.com/apache/avro/blob/master/lang/rust/avro/tests/schema.rs#L1080

(called test_fullname_fullname_and_namespace_specified())

However, the derive flow does not parse out the namespace from the name which is handled correctly from both Name::new() and Name:: parse() , which leads to a struct this is invalid against what is expected.

It would be nice to remove the derive Deserialize trait, and replace with a custom implementation or just removing the implementation all together (and double checking for side effects of that)