Update json module to jsonutils

oslo project provide jsonutils, and the others use it in many place,
this PS to update the json moudule to oslo jsonutils for consistency.

Change-Id: I3502f8f9e15cfc718f6665fb1c4f350e0cb05c0e

murano_tempest_tests/services/application_catalog/application_catalog_client.py

@@ -13,9 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import os
 
+from oslo_serialization import jsonutils as json
+
 import requests
 from tempest import config
 from tempest.lib.common import rest_client

murano_tempest_tests/services/artifacts/artifacts_client.py

@@ -13,9 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import os
 
+from oslo_serialization import jsonutils as json
+
 from tempest import config
 from tempest.lib.common import rest_client
 

murano_tempest_tests/services/service_broker/service_broker_client.py

@@ -14,7 +14,8 @@
 #    under the License.
 
 import base64
-import json
+
+from oslo_serialization import jsonutils as json
 
 from tempest import config
 from tempest.lib.common import rest_client

murano_tempest_tests/tests/api/service_broker/base.py

@@ -13,9 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import time
 
+from oslo_serialization import jsonutils as json
+
 from tempest.common import credentials_factory as common_creds
 from tempest import config
 from tempest.lib import exceptions

murano_tempest_tests/tests/api/service_broker/test_service_broker_actions.py

@@ -13,9 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import os
 
+from oslo_serialization import jsonutils as json
+
 from tempest.lib import decorators
 
 from murano_tempest_tests.tests.api.service_broker import base

murano_tempest_tests/tests/functional/common/utils.py

@@ -14,7 +14,6 @@
 
 import collections
 import contextlib
-import json
 import os
 import random
 import socket
@@ -28,6 +27,7 @@ from muranoclient import client as mclient
 import muranoclient.common.exceptions as exceptions
 from muranoclient.glance import client as glare_client
 from oslo_log import log as logging
+from oslo_serialization import jsonutils as json
 from tempest import config
 import yaml