add @Generated to all Java class templates

modules/swagger-codegen/src/main/resources/JavaSpringMVC/swaggerConfig.mustache

@@ -18,6 +18,7 @@ import springfox.documentation.swagger2.annotations.EnableSwagger2;
 @EnableSwagger2 //Loads the spring beans required by the framework
 @PropertySource("classpath:swagger.properties")
 @Import(SwaggerUiConfiguration.class)
+{{>generatedAnnotation}}
 public class SwaggerConfig {
     @Bean
     ApiInfo apiInfo() {