Fix using anyjson in fake_notifier

For some reason we were using anyjson.serialize() in our fake_notifier.
That may have been to mirror kombu, but really we need to mirror what we
do when we convert our payloads to primitives, which is using jsonutils.

Closes-Bug: #1403162
Change-Id: I92a4708e0700e88f4b2554aa4e7ad3856f5be1e0

nova/tests/unit/fake_notifier.py

@@ -15,8 +15,8 @@
 import collections
 import functools
 
-import anyjson
 from oslo import messaging
+from oslo.serialization import jsonutils
 
 from nova import rpc
 
@@ -54,7 +54,7 @@ class FakeNotifier(object):
         # NOTE(sileht): simulate the kombu serializer
         # this permit to raise an exception if something have not
         # been serialized correctly
-        anyjson.serialize(payload)
+        jsonutils.to_primitive(payload)
         msg = FakeMessage(self.publisher_id, priority, event_type, payload)
         NOTIFICATIONS.append(msg)