Support RxJava generation of ValidationHandlerBuilder and ValidationH…

…andler

Fixes vert-x3#1822

With this change, it is possible to do this with RxJava API:

ValidationHandler validation = ValidationHandlerBuilder.create(schemaParser)
  .body(Bodies.json(bodySchemaBuilder))
  .build();

And then use the validation handler in a rx-router.

Signed-off-by: Thomas Segismont <tsegismont@gmail.com>

vertx-web-validation/src/main/java/io/vertx/ext/web/validation/ValidationHandler.java

@@ -21,7 +21,7 @@ public interface ValidationHandler extends Handler<RoutingContext> {
 
   String REQUEST_CONTEXT_KEY = "requestParameters";
 
-  @GenIgnore
+  @GenIgnore(GenIgnore.PERMITTED_TYPE)
   static ValidationHandlerBuilder builder(SchemaParser parser) {
     return ValidationHandlerBuilder.create(parser);
   }

vertx-web-validation/src/main/java/io/vertx/ext/web/validation/builder/ValidationHandlerBuilder.java

@@ -63,6 +63,7 @@ public interface ValidationHandlerBuilder {
    *
    * @return
    */
+  @GenIgnore(GenIgnore.PERMITTED_TYPE)
   ValidationHandler build();
 
   static ValidationHandlerBuilder create(SchemaParser parser) {