[Java][Webclient ]Avoid double encoding on query params (#924)

* call build() with encoded = true

* Regenerate client

Author: marcoreni

modules/openapi-generator/src/main/resources/Java/libraries/webclient/ApiClient.mustache

@@ -545,7 +545,7 @@ public class ApiClient {
             builder.queryParams(queryParams);
         }
 
-        final WebClient.RequestBodySpec requestBuilder = webClient.method(method).uri(builder.build().toUri());
+        final WebClient.RequestBodySpec requestBuilder = webClient.method(method).uri(builder.build(true).toUri());
         if(accept != null) {
             requestBuilder.accept(accept.toArray(new MediaType[accept.size()]));
         }

samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/ApiClient.java

@@ -546,7 +546,7 @@ private WebClient.RequestBodySpec prepareRequest(String path, HttpMethod method,
             builder.queryParams(queryParams);
         }
 
-        final WebClient.RequestBodySpec requestBuilder = webClient.method(method).uri(builder.build().toUri());
+        final WebClient.RequestBodySpec requestBuilder = webClient.method(method).uri(builder.build(true).toUri());
         if(accept != null) {
             requestBuilder.accept(accept.toArray(new MediaType[accept.size()]));
         }