[#5942] skip some tests when ext/intl is not present

- When @ralphschindler ran using a PHP version that did not have
  ext/intl, these two tests failed. They should not run in that
  situation.

tests/ZendTest/Mvc/Service/TranslatorServiceFactoryTest.php

@@ -44,13 +44,21 @@ public function testReturnsMvcTranslatorWithDummyTranslatorComposedWhenExtIntlIs
 
     public function testReturnsMvcTranslatorWithI18nTranslatorComposedWhenNoTranslatorInterfaceOrConfigServicesPresent()
     {
+        if (!extension_loaded('intl')) {
+            $this->markTestSkipped('This test will only run if ext/intl is present');
+        }
+
         $translator = $this->factory->createService($this->services);
         $this->assertInstanceOf('Zend\Mvc\I18n\Translator', $translator);
         $this->assertInstanceOf('Zend\I18n\Translator\Translator', $translator->getTranslator());
     }
 
     public function testReturnsTranslatorBasedOnConfigurationWhenNoTranslatorInterfaceServicePresent()
     {
+        if (!extension_loaded('intl')) {
+            $this->markTestSkipped('This test will only run if ext/intl is present');
+        }
+
         $config = array('translator' => array(
             'locale' => 'en_US',
         ));