Requires python-ordereddict only if Centos6

OrderedDict class is a part of collections module since at least
python2.7 which is default python version for Centos 7.
For making it possible to use this code both on python26
and on python27 we wrap ordereddict imports into try/except.

Change-Id: I877506a8f039e86480c287e03387b9a3689d870e
Closes-Bug: #1509464

fuelmenu/settings.py

@@ -15,7 +15,12 @@
 import collections
 import logging
 
-from ordereddict import OrderedDict
+try:
+    from collections import OrderedDict
+except Exception:
+    # python 2.6 or earlier use backport
+    from ordereddict import OrderedDict
+
 import yaml
 
 

fuelmenu/tests/test_settings.py

@@ -14,8 +14,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+try:
+    from collections import OrderedDict
+except Exception:
+    # python 2.6 or earlier use backport
+    from ordereddict import OrderedDict
 import mock
-import ordereddict
 
 from fuelmenu import settings
 
@@ -38,11 +42,11 @@ sample:
             }
         ]
     }
-    assert isinstance(data, ordereddict.OrderedDict)
+    assert isinstance(data, OrderedDict)
 
 
 @mock.patch('fuelmenu.settings.file', side_effect=Exception('Error'))
 def test_read_settings_with_error(_):
     data = settings.Settings().read('some_path')
     assert data == {}
-    assert isinstance(data, ordereddict.OrderedDict)
+    assert isinstance(data, OrderedDict)

specs/fuelmenu.spec

@@ -22,9 +22,11 @@ Requires: python-netaddr
 Requires: python-netifaces
 Requires: python-urwid >= 1.1.0
 Requires: PyYAML
-Requires: python-ordereddict
 Requires: screen
 Requires: python-six
+%if 0%{?rhel} == 6
+Requires: python-ordereddict
+%endif
 
 %description
 Summary: Console utility for pre-configuration of Fuel server