Class and constructor variables are named after ref schema class

[mdanilakis]

Describe the bug

Class and constructor variables are named after ref schema class name which does not compile. We are only using this template because of the handy artifactType param that can be set to library because we want the models only.

How to Reproduce

Define a schema with props referencing another schema e.g.:

components:
  schemas:
    MySchema:
      type: object
      properties:
        prop1:
          $ref: '#components/schemas/MyOtherSchema'
        prop2:
          $ref: '#components/schemas/MyOtherSchema'
    MyOtherSchema:
      type: object
      properties:
        value:
          type: number
        unit:
          type: string

Expected behavior

Expected behavior would be to generate a class MySchema with a constructor and member variables named after the prop names e.g.:

public class MySchema {
  
  private MyOtherSchema prop1;
  private MyOtherSchema prop2;  

  public MySchema(MyOtherSchema prop1, MyOtherSchema prop2) {
    this.prop1 = prop1;
    this.prop2 = prop2;
  }
}

Actual behavior

Does not compile (variables already defined):

public class MySchema {
  
  private MyOtherSchema myOtherSchema;
  private MyOtherSchema myOtherSchema;  

  public MySchema(MyOtherSchema myOtherSchema, MyOtherSchema myOtherSchema) {
    this.myOtherSchema = myOtherSchema;
    this.myOtherSchema = myOtherSchema;
  }
}

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