Adding an import for java.util.List

Author: poojah-adyen

templates-v7/libraries/jersey3/api.mustache

@@ -13,6 +13,7 @@ import com.adyen.service.resource.Resource;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.List;
 
 {{#operations}}
 public class {{classname}} extends Service {