Fix the teams factory spec so it runs.

lms/djangoapps/teams/static/teams/js/spec/teams_factory_spec.js

@@ -11,7 +11,7 @@ define(["jquery", "backbone", "teams/js/teams_tab_factory"],
                     topics: {results: []},
                     topics_url: '',
                     teams_url: '',
-                    maxTeamSize: 9999
+                    maxTeamSize: 9999,
                     course_id: 'edX/DemoX/Demo_Course'
                 });
             });

lms/djangoapps/teams/static/teams/js/teams_tab_factory.js

@@ -1,8 +1,8 @@
 ;(function (define) {
     'use strict';
 
-    define(['jquery', 'teams/js/views/teams_tab'],
-        function ($, TeamsTabView) {
+    define(['jquery', 'underscore', 'backbone', 'teams/js/views/teams_tab'],
+        function ($, _, Backbone, TeamsTabView) {
             return function (options) {
                 var teamsTab = new TeamsTabView(_.extend(options, {el: $('.teams-content')}));
                 teamsTab.render();