API Apply SilverStripe\ORM namespace

code/Report.php

@@ -1,4 +1,8 @@
 <?php
+
+use SilverStripe\ORM\ArrayList;
+use SilverStripe\ORM\SS_List;
+
 /**
  * Base "abstract" class creating reports on your data.
  *

code/ReportAdmin.php

@@ -1,4 +1,7 @@
 <?php
+
+use SilverStripe\ORM\ArrayList;
+
 /**
  * Reports section of the CMS.
  *

tests/ReportTest.php

@@ -1,5 +1,7 @@
 <?php
 
+use SilverStripe\ORM\ArrayList;
+
 /**
  * @package reports
  * @subpackage tests