JS client: remove "undefined" from model dependency arguments

Closes #2279

modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultGenerator.java

@@ -197,6 +197,7 @@ public class DefaultGenerator extends AbstractGenerator implements Generator {
                         Map<String, Model> modelMap = new HashMap<String, Model>();
                         modelMap.put(name, model);
                         Map<String, Object> models = processModels(config, modelMap, definitions);
+                        models.put("classname", config.toModelName(name));
                         models.putAll(config.additionalProperties());
                         
                         allProcessedModels.put(name, models);