Skip some more random failing tests on php 5.3

tests/PHPUnit/Impl/SystemTestCase.php

@@ -571,4 +571,11 @@ abstract class SystemTestCase extends PHPUnit_Framework_TestCase
 
         ArchiveTableCreator::refreshTableList($forceReload = true);
     }
+
+    protected function skipWhenPhp53()
+    {
+        if(\Piwik\Tests\Impl\SystemTestCase::isPhpVersion53()) {
+            $this->markTestSkipped('Sometimes fail on php 5.3');
+        }
+    }
 }

tests/PHPUnit/Integration/CliMultiTest.php

@@ -83,6 +83,7 @@ class Core_CliMultiTest extends SystemTestCase
 
     public function test_request_shouldRunAsync()
     {
+        $this->skipWhenPhp53();
         $this->assertTrue($this->cliMulti->supportsAsync);
     }
 
@@ -142,12 +143,14 @@ class Core_CliMultiTest extends SystemTestCase
      */
     public function test_request_shouldDetectFinishOfRequest_IfNoParamsAreGiven()
     {
+        $this->skipWhenPhp53();
         $response = $this->cliMulti->request(array($this->completeUrl('')));
         $this->assertStringStartsWith('Error: no website was found', $response[0]);
     }
 
     public function test_request_shouldBeAbleToRenderARegularPageInPiwik()
     {
+        $this->skipWhenPhp53();
         Fixture::createWebsite('2014-01-01 00:00:00');
 
         $urls = array($this->completeUrl('/?module=Widgetize&idSite=1&period=day&date=today'));

tests/PHPUnit/Integration/Plugin/SettingsTest.php

@@ -417,9 +417,7 @@ class Core_Plugin_SettingsTest extends IntegrationTestCase
 
     public function test_getSettingsForCurrentUser_shouldReturnAllSettingsIfEnoughPermissionsAndSortThemBySettingOrder()
     {
-        if(\Piwik\Tests\Impl\SystemTestCase::isPhpVersion53()) {
-            $this->markTestSkipped('does not pass on PHP 5.3.3');
-        }
+        $this->skipWhenPhp53();
         $this->setSuperUser();
 
         $this->addSystemSetting('mysystemsetting1', 'mytitle1');