Fix pep8 errors

Recent pep8 upgrade and corresponding pycodestyle update break
horizon pep8 job due to the new rules.

This commit fixes the following new errors:
- E226 missing whitespace around arithmetic operator
- E241 multiple spaces after ','
- E731 do not assign a lambda expression, use a def

The following errors are added to the ignore list
as there are many errors:
- E402 module level import not at top of file
- W503 line break before binary operator

Change-Id: I3478b0684175d2604bbcc1d89cbfca298b97f1e1

openstack_dashboard/dashboards/project/instances/utils.py

@@ -53,7 +53,8 @@ def sort_flavor_list(request, flavors):
         sort_key = flavor_sort.get('key', 'ram')
         rev = flavor_sort.get('reverse', False)
         if not callable(sort_key):
-            key = lambda flavor: get_key(flavor, sort_key)
+            def key(flavor):
+                return get_key(flavor, sort_key)
         else:
             key = sort_key
         flavor_list = [(flavor.id, '%s' % flavor.name)