Enable Scheduled reports with images, on PHP 5.4 (my box & travis) rather than 5.3

tests/PHPUnit/BaseFixture.php

@@ -22,6 +22,10 @@
  */
 abstract class Test_Piwik_BaseFixture extends PHPUnit_Framework_Assert
 {
+    const IMAGES_GENERATED_ONLY_FOR_OS = 'linux';
+    const IMAGES_GENERATED_FOR_PHP = '5.4.13';
+    const IMAGES_GENERATED_FOR_GD = '2.0';
+
     /** Adds data to Piwik. Creates sites, tracks visits, imports log files, etc. */
     public abstract function setUp();
 
@@ -259,9 +263,9 @@ abstract class Test_Piwik_BaseFixture extends PHPUnit_Framework_Assert
     {
         $gdInfo = gd_info();
         return
-            (stristr(php_uname(), 'precise32') || stristr(php_uname(), 'ubuntu')) &&
-            stristr(phpversion(), '5.3.10') &&
-            $gdInfo['GD Version'] == '2.0';
+            (stristr(php_uname(), self::IMAGES_GENERATED_ONLY_FOR_OS)) &&
+            stristr(phpversion(), self::IMAGES_GENERATED_FOR_PHP) &&
+            $gdInfo['GD Version'] == self::IMAGES_GENERATED_FOR_GD;
     }
 
     public static $geoIpDbUrl = 'http://piwik-team.s3.amazonaws.com/GeoIP.dat.gz';

tests/PHPUnit/IntegrationTestCase.php

@@ -264,8 +264,8 @@ abstract class IntegrationTestCase extends PHPUnit_Framework_TestCase
                 'Do take note that scheduled reports are not being tested with images. ' .
                     'If images contained in scheduled reports have been altered, tests will fail on the Piwik QA Server. ' .
                     'To include images in the test suite, please use a machine with the following specifications : ' .
-                    'OS = Linux precise32, PHP Version = 5.3.10 and GD Version = 2.0' .
-                    "\n Ignore this message if you're running on your dev machine, but pay attention when it comes from Jenkins."
+                    'OS = '.Test_Piwik_BaseFixture::IMAGES_GENERATED_ONLY_FOR_OS.', PHP Version = '.Test_Piwik_BaseFixture::IMAGES_GENERATED_FOR_PHP.' and GD Version = ' . Test_Piwik_BaseFixture::IMAGES_GENERATED_FOR_GD
+                    . "\n Ignore this message if you're running on your dev machine, but pay attention when it comes from the CI server."
 
             );
         }