Merge remote-tracking branch 'ogresCE/MAGETWO-42842-Setup-Unit-Tests-CC' into PR_Branch

setup/src/Magento/Setup/Test/Unit/Model/InstallerTest.php

@@ -489,3 +489,15 @@ class InstallerTest extends \PHPUnit_Framework_TestCase
         return $newObject;
     }
 }
+
+namespace Magento\Setup\Model;
+
+/**
+ * Mocking autoload function
+ * 
+ * @returns array
+ */
+function spl_autoload_functions()
+{
+    return ['mock_function_one', 'mock_function_two'];
+}