Allow country code EL for greek vat numbers (#10)

Author: lruozzi9

features/checkout/filling_invoicing_information/filling_invoicing_information_as_european_company.feature

@@ -8,7 +8,9 @@ Feature: Filling invoicing information as an european company
         Given the store operates on a single channel in "Italy"
         And channel "Italy" billing data is "Merchant S.p.A.", "Via Roma 12", "12345" "Milano", "Italy" with "06549840962" tax ID
         And the store operates in "Germany"
+        And the store operates in "Greece"
         And this channel operates in the "Germany" country
+        And this channel operates in the "Greece" country
         And the store ships everywhere for free
         And the store has a product "PHP T-Shirt" priced at "$19.99"
         And I have product "PHP T-Shirt" in the cart
@@ -21,3 +23,11 @@ Feature: Filling invoicing information as an european company
         And I specify a valid billing VAT number for a german company
         And I complete the addressing step
         Then I should be on the checkout shipping step
+
+    @ui
+    Scenario: Filling invoicing information as a greek company
+        When I specify the email as "jon.snow@example.com"
+        And I specify the billing address for the company "GoT GmbH" - "Jon Snow" - "EO Kalampakas Grevenon", "422 00", "Kalampaka" - "Greece"
+        And I specify a valid billing VAT number for a greek company
+        And I complete the addressing step
+        Then I should be on the checkout shipping step

tests/Application/config/validator/Address.xml

@@ -147,7 +147,7 @@
             </constraint>
             <constraint name="Sandwich\ViesBundle\Validator\Constraint\VatNumber">
                 <option name="message">webgriffe_sylius_italian_invoiceable_order.address.european_vat_number.valid</option>
-                <option name="format">GR</option>
+                <option name="format">EL</option>
                 <option name="groups">
                     <value>company-GR</value>
                 </option>

tests/Behat/Context/Ui/Shop/Checkout/CheckoutAddressingContext.php

@@ -280,6 +280,14 @@ public function iSpecifyAValidBillingVatNumberForAGermanCompany(): void
         $this->addressPage->specifyBillingVatNumber('DE812871812');
     }
 
+    /**
+     * @When /^I specify a valid billing VAT number for a greek company$/
+     */
+    public function iSpecifyAValidBillingVatNumberForAGreekCompany(): void
+    {
+        $this->addressPage->specifyBillingVatNumber('EL094229666');
+    }
+
     /**
      * @Given /^I do not specify the billing recipient type in the billing address$/
      */