[java] incorrect generation of java Object

version: 2.1.6

swagger specs:

"Attributes" : {
  "type" : "object"
},

instead of mapping it to java object, it create new class

package com.macomp;
import java.util.Objects;
@javax.annotation.Generated(value = "class io.swagger.codegen.languages.JavaClientCodegen", date = "2016-04-14T08:31:30.310-07:00")
public class Attributes   {

  @Override
  public boolean equals(Object o) {
      if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    Attributes attributes = (Attributes) o;
    return true;
  }

  @Override
  public int hashCode() {
    return Objects.hash();
  }

  @Override
  public String toString() {
    StringBuilder sb = new StringBuilder();
   sb.append("class Attributes {\n");

   sb.append("}");
   return sb.toString();
  }

  /**
   * Convert the given object to string with each line indented by 4 spaces
   * (except the first line).
   */
  private String toIndentedString(Object o) {
    if (o == null) {
      return "null";
    }
    return o.toString().replace("\n", "\n    ");
  }
}

Start with the Java generation path for version 2.1.6 and reproduce the report using the supplied Swagger definition where Attributes has type object. Compare the generated Attributes class with the intended Java object mapping; done means the definition no longer produces the incorrect empty class.