bug fix propertyNames schema is not removed as unreferenced by SpecFilter #5017#5020

ewaostrowska merged 1 commit intoswagger-api:masterswagger-api/swagger-core:masterfrom

OllieKosh:bugfix/5017-property-names-schema-wrongfully-errasedOllieKosh/swagger-core:bugfix/5017-property-names-schema-wrongfully-errasedCopy head branch name to clipboard