minor #40606 [Form] skip intl dependent tests if the extension is missing (xabbuh)

This PR was merged into the 4.4 branch.

Discussion
----------

[Form] skip intl dependent tests if the extension is missing

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |

Commits
-------

71da904de0 skip intl dependent tests if the extension is missing

src/Symfony/Component/Form/Tests/Extension/Core/Type/IntegerTypeTest.php

@@ -31,6 +31,9 @@ class IntegerTypeTest extends BaseTypeTest
         \Locale::setDefault($this->previousLocale);
     }
 
+    /**
+     * @requires extension intl
+     */
     public function testArabicLocale()
     {
         \Locale::setDefault('ar');
@@ -42,6 +45,9 @@ class IntegerTypeTest extends BaseTypeTest
         $this->assertSame('123456', $form->getViewData());
     }
 
+    /**
+     * @requires extension intl
+     */
     public function testArabicLocaleNonHtml5()
     {
         \Locale::setDefault('ar');