Switch to using 'oslo_serialization' vs 'oslo.serialization'

Prefer the non-deprecated 'oslo_serialization' instead of
the namespaced 'oslo.serialization' wherever it was previously
used.

Change-Id: I652cf0b56e28d727c59fe0c060949bb2bd920d11

taskflow/jobs/backends/impl_zookeeper.py

@@ -23,7 +23,7 @@ from concurrent import futures
 from kazoo import exceptions as k_exceptions
 from kazoo.protocol import paths as k_paths
 from kazoo.recipe import watchers
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 from oslo_utils import excutils
 from oslo_utils import uuidutils
 import six

taskflow/persistence/backends/impl_dir.py

@@ -19,7 +19,7 @@ import errno
 import os
 import shutil
 
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 import six
 
 from taskflow import exceptions as exc

taskflow/persistence/backends/impl_zookeeper.py

@@ -18,7 +18,7 @@ import contextlib
 
 from kazoo import exceptions as k_exc
 from kazoo.protocol import paths
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 
 from taskflow import exceptions as exc
 from taskflow import logging

taskflow/persistence/backends/sqlalchemy/models.py

@@ -15,7 +15,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 from oslo_utils import timeutils
 from oslo_utils import uuidutils
 from sqlalchemy import Column, String, DateTime, Enum

taskflow/tests/unit/jobs/test_zk_job.py

@@ -14,7 +14,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 from oslo_utils import uuidutils
 import six
 import testtools

taskflow/tests/unit/test_listeners.py

@@ -18,7 +18,7 @@ import contextlib
 import logging
 import time
 
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 from oslo_utils import reflection
 import six
 from zake import fake_client

taskflow/utils/misc.py

@@ -25,7 +25,7 @@ import sys
 import threading
 import types
 
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 from oslo_utils import importutils
 from oslo_utils import netutils
 from oslo_utils import reflection