update admin manage group page

static/scripts/sysadmin-app/collection/group-repos.js

@@ -0,0 +1,29 @@
+define([
+    'underscore',
+    'backbone',
+    'common',
+    'sysadmin-app/models/group-repo'
+], function(_, Backbone, Common, GroupRepoModel) {
+
+    'use strict';
+
+    var GroupRepoCollection = Backbone.Collection.extend({
+
+        model: GroupRepoModel,
+
+        setGroupId: function(group_id) {
+            this.group_id = group_id;
+        },
+
+        parse: function (data) {
+            this.group_name= data.group_name;
+            return data.libraries; // return the array
+        },
+
+        url: function () {
+            return Common.getUrl({name: 'admin-group-libraries', group_id: this.group_id});
+        }
+    });
+
+    return GroupRepoCollection;
+});