To load xml bootstrap file, like in this configuration :

```
<?xml version="1.0" encoding="UTF-8"?>
<phpunit bootstrap="bootstrap.php" >

	<testsuites>
		<testsuite name="Sincronizar">
			<directory suffix=".php">tests</directory>
		</testsuite>
	</testsuites>

	<!-- This is required for VPU to work correctly -->
	<listeners>
		<listener class="PHPUnit_Util_Log_JSON"></listener>
	</listeners>

</phpunit>
```