Hacking: a new hacking check was added that used an existing number

Commit 243879f5c51fc45f03491bcb78765945ddf76be8 added in a new hacking
check that used an existing number.

The new number is 324 (and not 323)

Change-Id: I7e604a408387438105c435ad16a1fa3d6491b642
Closes-bug: #1356815

HACKING.rst

@@ -36,6 +36,7 @@ Nova Specific Commandments
 - [N321] Validate that LOG messages, except debug ones, have translations
 - [N322] Method's default argument shouldn't be mutable
 - [N323] Ensure that the _() function is explicitly imported to ensure proper translations.
+- [N324] Ensure that jsonutils.%(fun)s must be used instead of json.%(fun)s
 
 Creating Unit Tests
 -------------------

nova/hacking/checks.py

@@ -293,7 +293,7 @@ def use_jsonutils(logical_line, filename):
     if "plugins/xenserver" in filename:
         return
 
-    msg = "N323: jsonutils.%(fun)s must be used instead of json.%(fun)s"
+    msg = "N324: jsonutils.%(fun)s must be used instead of json.%(fun)s"
 
     if "json." in logical_line:
         json_funcs = ['dumps', 'dump', 'loads', 'load']

nova/tests/test_hacking.py

@@ -220,7 +220,7 @@ class HackingTestCase(test.NoDBTestCase):
 
     def test_use_jsonutils(self):
         def __get_msg(fun):
-            msg = ("N323: jsonutils.%(fun)s must be used instead of "
+            msg = ("N324: jsonutils.%(fun)s must be used instead of "
                    "json.%(fun)s" % {'fun': fun})
             return (0, msg)