Make FeedsDateTimeTest a real unit test.

tests/feeds_date_time.test

@@ -12,7 +12,7 @@
  * Not inheriting from Feeds base class as ParserCSV should be moved out of
  * Feeds at some time.
  */
-class FeedsDateTimeTest extends FeedsWebTestCase {
+class FeedsDateTimeTest extends FeedsUnitTestHelper {
   protected $profile = 'testing';
 
   public static function getInfo() {
@@ -23,6 +23,11 @@ class FeedsDateTimeTest extends FeedsWebTestCase {
     );
   }
 
+  public function setUp() {
+    parent::setUp();
+    module_load_include('inc', 'feeds' , 'plugins/FeedsParser');
+  }
+
   /**
    * Dispatch tests, only use one entry point method testX to save time.
    */