License year updated
<?xml version="1.0" encoding="utf-8"?>
<!--
- ~ Copyright (c) 2017, WSO2 Inc. (http://wso2.com) All Rights Reserved.
+ ~ Copyright (c) 2018, WSO2 Inc. (http://wso2.com) All Rights Reserved.
~
~ Licensed under the Apache License, Version 2.0 (the "License");
~ you may not use this file except in compliance with the License.
