Issue in #ref while generating Server side spring code

I am quite new to Swagger UI and working on generating Spring code (Server) from a given YAML file. Here is my problem statement. 

The yaml file has few objects which are present in another yaml file and it uses #ref to refer them. Here is an example:

--------------------------------------------------------------------------------------------------------

- name: supported-features
  in: query
  description: To filter irrelevant responses related to unsupported features
  schema:
  $ref: 'TS29571_CommonData.yaml#/components/schemas/SupportedFeatures'

--------------------------------------------------------------------------------------------------------

The attribute "SupportedFeatures" is defined as "String" (Primitive Type) datatype in TS29571_CommonData.yaml file. 

The issue is when I am generating the code, the resulting java code is as follows:

import io.swagger.model.TS29571CommonDataYamlcomponentsschemasSupportedFeatures;

1. How do I make sure that the compiler actually opens the referred yaml file and generate the code correctly? As its a primitive datatype, we even dont need to import this. 

2. Secondly, how can I change the package name. (io.swagger.api)

Apologize if this query has been already asked.

Thanks 

Pranay