switch to oslo_serialization

oslo.serialization 1.2.0 has moved its namespace from old
oslo.serialization to oslo_serialization, the old import style can
still work, but will not be supported in next release cycle.

Let's sync it.

Change-Id: I736ac975c50b2550548fde054c7840960435a698

ceilometer/alarm/notifier/rest.py

@@ -15,9 +15,9 @@
 """Rest alarm notifier."""
 
 import eventlet
-from oslo.serialization import jsonutils
 from oslo_config import cfg
 from oslo_context import context
+from oslo_serialization import jsonutils
 import requests
 import six.moves.urllib.parse as urlparse
 

ceilometer/messaging.py

@@ -14,9 +14,9 @@
 # under the License.
 
 import oslo.messaging
-from oslo.serialization import jsonutils
 from oslo_config import cfg
 from oslo_context import context
+from oslo_serialization import jsonutils
 
 DEFAULT_URL = "__default__"
 TRANSPORTS = {}

ceilometer/storage/impl_sqlalchemy.py

@@ -20,8 +20,8 @@ import os
 
 from oslo.db import exception as dbexc
 from oslo.db.sqlalchemy import session as db_session
-from oslo.serialization import jsonutils
 from oslo_config import cfg
+from oslo_serialization import jsonutils
 from oslo_utils import timeutils
 import six
 import sqlalchemy as sa

ceilometer/storage/sqlalchemy/migrate_repo/versions/038_normalise_tables.py

@@ -13,7 +13,7 @@
 import hashlib
 
 import migrate
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 import sqlalchemy as sa
 
 

ceilometer/tests/alarm/test_notifier.py

@@ -14,9 +14,9 @@
 # under the License.
 
 import mock
-from oslo.serialization import jsonutils
 from oslo_config import fixture as fixture_config
 from oslo_context import context
+from oslo_serialization import jsonutils
 from oslotest import mockpatch
 import requests
 import six.moves.urllib.parse as urlparse

ceilometer/tests/api/v2/test_alarm_scenarios.py

@@ -19,7 +19,7 @@ import uuid
 
 import mock
 import oslo.messaging.conffixture
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 import six
 from six import moves
 

ceilometer/tests/api/v2/test_list_meters_scenarios.py

@@ -19,7 +19,7 @@
 import base64
 import datetime
 
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 import webtest.app
 
 from ceilometer.publisher import utils

ceilometer/tests/publisher/test_utils.py

@@ -14,7 +14,7 @@
 # under the License.
 """Tests for ceilometer/publisher/utils.py
 """
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 from oslotest import base
 
 from ceilometer.publisher import utils