MINOR Removed dependency on sapphire fixture file

tests/SubsitesVirtualPageTest.php

@@ -3,7 +3,7 @@
 class SubsitesVirtualPageTest extends SapphireTest {
 	static $fixture_file = array(
 		'subsites/tests/SubsiteTest.yml',
-		'sapphire/tests/FileLinkTrackingTest.yml',
+		'subsites/tests/SubsitesVirtualPageTest.yml',
 	);
 	
 	function setUp() {

tests/SubsitesVirtualPageTest.yml

@@ -0,0 +1,10 @@
+# These need to come first so that SiteTree has the link meta-data written.
+File:
+   file1:
+      Filename: assets/testscript-test-file.pdf
+
+Page:   
+   page1:
+      Title: page1
+      URLSegment: page1
+      Content: <p><img src="assets/testscript-test-file.pdf" /></p>