Add loader.js into requirements of all HTML unit test files

https://pagure.io/freeipa/issue/6974

Reviewed-By: Petr Vobornik <pvoborni@redhat.com>

install/ui/test/ordered_map_tests.html

@@ -4,6 +4,7 @@
     <title>Ordered Map Test Suite</title>
     <link rel="stylesheet" href="qunit.css" type="text/css" media="screen">
     <script type="text/javascript" src="qunit.js"></script>
+    <script type="text/javascript" src="../js/libs/loader.js"></script>
     <script type="text/javascript" src="../js/libs/jquery.js"></script>
     <script type="text/javascript" src="../js/libs/jquery.ordered-map.js"></script>
     <script type="text/javascript" src="config.js"></script>