Fix use \Thelia\Model\OrderStatus constants

	modified:   Controller/ConfigurePaypal.php
	modified:   Controller/PaypalResponse.php
	modified:   Form/ConfigurePaypal.php
	modified:   Form/ConfigureSandboxPaypal.php
	modified:   Model/ConfigInterface.php
	modified:   Model/PaypalConfig.php
	modified:   Paypal.php