Fixes typo in the fuel-menu urwid wrapper

The fuel-menu has a typo in CheckBox object mapping
from the original urwid.

Change-Id: Ida129483678ff1a559d8e0a4edf6f2e866657871
Closes-Bug: #1513180

fuelmenu/common/urwidwrapper.py

@@ -60,7 +60,7 @@ def ChoicesGroup(choices, default_value=None, fn=None):
 
 def CheckBox(label, state=False, callback=None):
     """Returns an Urwid CheckBox object."""
-    return urwid.Checkbox(label,
+    return urwid.CheckBox(label,
                           state=state,
                           on_state_change=callback)
 

fuelmenu/tests/test_common_urwidwrapper.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+
+#    Copyright 2015 Mirantis, Inc.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from fuelmenu.common import urwidwrapper
+import unittest
+
+
+class TestUtils(unittest.TestCase):
+
+    def test_urwidwrapper_correctly_maps_checkbox_object(self):
+        urwidwrapper.CheckBox('Label')