[BUG] [jaxrs-spec] equals/hashCode methods in POJOs ignore parent variables

Created by: PhilippParis

Description

When using allOf in the yaml OpenAPI 3.0 file the equals and hashCode methods in generated model classes ignore the parent class properties.

openapi-generator version

Tested with version 4.0, 3.3.4, 3.3.3 and current master branch

OpenAPI declaration file content or url

allof.yaml

Command line used for generation

java -jar openapi-generator-cli.jar generate -g jaxrs-spec -i allof.yaml -o gen/

expected result

Adult.java

@Override
  public boolean equals(java.lang.Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    Adult adult = (Adult) o;
    return Objects.equals(this.children, adult.children) &&
        super.equals(o);
  }

actual result

Adult.java

@Override
  public boolean equals(java.lang.Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    Adult adult = (Adult) o;
    return Objects.equals(children, adult.children);
  }

Suggest a fix

update equals/hashcode implementations in JavaJaxRS/spec/pojo.mustache template to match Java/pojo.mustache