Use utils.utcnow rather than datetime.utcnow

Fixes bug #1003587

Edit direct use of datetime.utcnow or datetime.now to utilize utils.utcnow

Change-Id: I1130f6e664f252fc5da7304f495dc9f980721224

nova/tests/test_db_api.py

@@ -96,7 +96,7 @@ class DbApiTestCase(test.TestCase):
         db.migration_update(ctxt, migration.id, {"status": "CONFIRMED"})
 
         # Ensure the new migration is not returned.
-        updated_at = datetime.datetime.utcnow()
+        updated_at = utils.utcnow()
         values = {"status": "finished", "updated_at": updated_at}
         migration = db.migration_create(ctxt, values)
         results = db.migration_get_all_unconfirmed(ctxt, 10)
@@ -120,7 +120,7 @@ class DbApiTestCase(test.TestCase):
         db.instance_update(ctxt, instance.id, {"task_state": None})
 
         # Ensure the newly rebooted instance is not returned.
-        updated_at = datetime.datetime.utcnow()
+        updated_at = utils.utcnow()
         values = {"task_state": "rebooting", "updated_at": updated_at}
         instance = db.instance_create(ctxt, values)
         results = db.instance_get_all_hung_in_rebooting(ctxt, 10)

nova/tests/test_xenapi.py

@@ -18,7 +18,6 @@
 
 import ast
 import contextlib
-import datetime
 import functools
 import os
 import re
@@ -43,6 +42,7 @@ from nova.tests import fake_network
 from nova.tests import fake_utils
 from nova.tests.glance import stubs as glance_stubs
 from nova.tests.xenapi import stubs
+from nova import utils
 from nova.virt.xenapi import connection as xenapi_conn
 from nova.virt.xenapi import fake as xenapi_fake
 from nova.virt.xenapi import vm_utils
@@ -1398,8 +1398,7 @@ class XenAPIBWUsageTestCase(test.TestCase):
                 self.name = "instance-0001"
                 self.uuid = "1-2-3-4-5"
 
-        result = self.conn.get_all_bw_usage([testinstance()],
-                datetime.datetime.utcnow())
+        result = self.conn.get_all_bw_usage([testinstance()], utils.utcnow())
         self.assertEqual(result, [])