Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?

Description

Refed Enum with default value causes build break in jaxrs-jersey generator.

openapi-generator version

current master (4e85993)

probably since c871e3b

Build break is a regression.
I known that old version also didn't generate a suitable output (cf #1323).

OpenAPI declaration file content or url

bug can be reproduced with
fuj1g0n@e808284

Command line used for generation

re-generate samples with bin/openapi3/jaxrs-jersey-petstore.sh (fuj1g0n@cab6857)

Steps to reproduce

Related issues/PRs

• [General] default value of enum property that are $ref-ed is not recognized #1323

Suggest a fix