[BUG] openapi-generator-maven-plugin version 5.2.1 not encoded comma

Created by: laidani

Hello, after upgrading openapi-generator-maven-plugin from 5.1.1 to 5.2.1, we notice that comma is not encoded in urls

https://localhost/v1/pets/v1.0/infos?code=1234&languages=fr%2Cen
https://localhost/v1/pets/v1.0/infos?code=1234&languages=fr,en

The first url work very well because the comma is encoded to %2C, but the second is not working because the comma is not encoded.

The question now: is this a bug, or we should to add some configuration to encode commas ?

More details If we look at the class ApiClient we can easily notice that the encoded part is removed from the new version

Version 5.1.1

public <T> ResponseEntity<T> invokeAPI(String path, HttpMethod method, MultiValueMap<String, String> queryParams, Object body, HttpHeaders headerParams, MultiValueMap<String, String> cookieParams, MultiValueMap<String, Object> formParams, List<MediaType> accept, MediaType contentType, String[] authNames, ParameterizedTypeReference<T> returnType) throws RestClientException {
        updateParamsForAuth(authNames, queryParams, headerParams, cookieParams);

        final UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(basePath).path(path);
        if (queryParams != null) {
            //encode the query parameters in case they contain unsafe characters
            for (List<String> values : queryParams.values()) {
                if (values != null) {
                    for (int i = 0; i < values.size(); i++) {
                        try {
                            values.set(i, URLEncoder.encode(values.get(i), "utf8"));
                        } catch (UnsupportedEncodingException e) {

                        }
                    }
                }
            }
            builder.queryParams(queryParams);							   
        }
																  
        URI uri;
        try {
            uri = new URI(builder.build().toUriString());
        } catch(URISyntaxException ex)  {
            throw new RestClientException("Could not build URL: " + builder.toUriString(), ex);
        }

        final BodyBuilder requestBuilder = RequestEntity.method(method, uri);
        if(accept != null) {
            requestBuilder.accept(accept.toArray(new MediaType[accept.size()]));
        }
        if(contentType != null) {
            requestBuilder.contentType(contentType);
        }

Version 5.2.1

public <T> ResponseEntity<T> invokeAPI(String path, HttpMethod method, Map<String, Object> pathParams, MultiValueMap<String, String> queryParams, Object body, HttpHeaders headerParams, MultiValueMap<String, String> cookieParams, MultiValueMap<String, Object> formParams, List<MediaType> accept, MediaType contentType, String[] authNames, ParameterizedTypeReference<T> returnType) throws RestClientException {
        updateParamsForAuth(authNames, queryParams, headerParams, cookieParams);

   	    Map<String,Object> uriParams = new HashMap();
        uriParams.putAll(pathParams);
										
        String finalUri = path;

        if (queryParams != null && !queryParams.isEmpty()) {
            //Include queryParams in uriParams taking into account the paramName
            String queryUri = generateQueryUri(queryParams, uriParams);
            //Append to finalUri the templatized query string like "?param1={param1Value}&.......
            finalUri += "?" + queryUri;
        }
        String expandedPath = this.expandPath(finalUri, uriParams);
        final UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(basePath).path(expandedPath);

        URI uri;
        try {
            uri = new URI(builder.build().toUriString());
        } catch (URISyntaxException ex)  {
            throw new RestClientException("Could not build URL: " + builder.toUriString(), ex);
        }

        final BodyBuilder requestBuilder = RequestEntity.method(method, uri);
        if (accept != null) {
            requestBuilder.accept(accept.toArray(new MediaType[accept.size()]));
        }
        if (contentType != null) {
            requestBuilder.contentType(contentType);
        }