RemoteSerializer does not include `headers` and field incorrectly marks as Required
In 3.10 a new
headers field was added for all Remotes with this PR https://github.com/pulp/pulpcore/pull/1041/files
There are two issues with this:
RemoteSerializerdoes actually name
headersto be an included field in the metaclass
- The field defined does not allow it to be optional, which it needs to be optional.
Because of (1) problem (2) was hidden during 3.10 usage.