[Java/Spring] Child without properties does not have super.equals

The following definitions:

  ObjectA:
    type: object
    properties:
      a:
        type: string
    required:
      - a
  ObjectB:
    allOf:
      - $ref: '#/[...]/ObjectA'
      - type: object
        required: 
        - b
        properties:
          b:
            type: string

generates a class for ObjectB which contains

  public boolean equals(java.lang.Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    ObjectB objectB= (ObjectB) o;
    return Objects.equals(this.b, objectB.b) &&
        super.equals(o);
  }

However, these definitions:

  ObjectA:
    type: object
    properties:
      a:
        type: string
    required:
      - a
  ObjectB:
    allOf:
      - $ref: '#/[...]/ObjectA'
      - type: object

generates a class for ObjectB which contains

  public boolean equals(java.lang.Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    return true;
  }

This however, is falsy.
It also shows in https://github.com/swagger-api/swagger-codegen-generators/blob/dddb3f3ab95b9859927c1b54215651046676e475/src/main/resources/handlebars/Java/pojo.mustache#L181 that this was an issue for plain java before.
Therefore https://github.com/swagger-api/swagger-codegen-generators/blob/dddb3f3ab95b9859927c1b54215651046676e475/src/main/resources/handlebars/JavaSpring/pojo.mustache#L124 should be changed accordingly.

Start in src/main/resources/handlebars/JavaSpring/pojo.mustache around line 124, then compare the corresponding equals implementation in src/main/resources/handlebars/Java/pojo.mustache around line 181. Verify the generated ObjectB equals method preserves superclass equality even when the child has no properties; done means the JavaSpring template handles both child shapes consistently.