Fix ray raster image in svg (#9371)

* fix-ray-image

* Include svg tests in os group

* update test data

tests/SVGTest.php

@@ -30,6 +30,11 @@ use RecursiveIteratorIterator;
 use RecursiveRegexIterator;
 use RegexIterator;
 
+/**
+ * Class SVGTest
+ * @package LibreNMS\Tests
+ * @group os
+ */
 class SVGTest extends TestCase
 {
     public function testSVGContainsPNG()