Switch to using oslo_* instead of oslo.*

The oslo team is recommending everyone to switch to the
non-namespaced versions of libraries. Updating the hacking
rule to include a check to prevent oslo.* import from
creeping back in.

This commit includes:
- using oslo_utils instead of oslo.utils
- using oslo_serialization instead of oslo.serialization
- using oslo_db instead of oslo.db
- using oslo_i18n instead of oslo.i18n
- using oslo_middleware instead of oslo.middleware
- using oslo_config instead of oslo.config
- using oslo_messaging instead of "from oslo import messaging"
- using oslo_vmware instead of oslo.vmware

Change-Id: I3e2eb147b321ce3e928817b62abcb7d023c5f13f

nova/db/api.py

@@ -27,8 +27,8 @@ these objects be simple dictionaries.
 
 """
 
-from oslo.config import cfg
-from oslo.db import concurrency
+from oslo_config import cfg
+from oslo_db import concurrency
 
 from nova.cells import rpcapi as cells_rpcapi
 from nova.i18n import _LE

nova/db/base.py

@@ -16,8 +16,8 @@
 
 """Base class for classes that need modular database access."""
 
-from oslo.config import cfg
-from oslo.utils import importutils
+from oslo_config import cfg
+from oslo_utils import importutils
 
 db_driver_opt = cfg.StrOpt('db_driver',
                            default='nova.db',

nova/db/sqlalchemy/api.py

@@ -26,12 +26,12 @@ import threading
 import time
 import uuid
 
-from oslo.config import cfg
-from oslo.db import exception as db_exc
-from oslo.db.sqlalchemy import session as db_session
-from oslo.db.sqlalchemy import utils as sqlalchemyutils
-from oslo.utils import excutils
-from oslo.utils import timeutils
+from oslo_config import cfg
+from oslo_db import exception as db_exc
+from oslo_db.sqlalchemy import session as db_session
+from oslo_db.sqlalchemy import utils as sqlalchemyutils
+from oslo_utils import excutils
+from oslo_utils import timeutils
 import retrying
 import six
 from sqlalchemy import and_

nova/db/sqlalchemy/migration.py

@@ -19,7 +19,7 @@ import os
 from migrate import exceptions as versioning_exceptions
 from migrate.versioning import api as versioning_api
 from migrate.versioning.repository import Repository
-from oslo.db.sqlalchemy import utils as db_utils
+from oslo_db.sqlalchemy import utils as db_utils
 import sqlalchemy
 from sqlalchemy.sql import null
 

nova/db/sqlalchemy/types.py

@@ -16,7 +16,7 @@
 """Custom SQLAlchemy types."""
 
 import netaddr
-from oslo.utils import netutils
+from oslo_utils import netutils
 from sqlalchemy.dialects import postgresql
 from sqlalchemy import types
 

nova/db/sqlalchemy/utils.py

@@ -13,8 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from oslo.db import exception as db_exc
-from oslo.db.sqlalchemy import utils as oslodbutils
+from oslo_db import exception as db_exc
+from oslo_db.sqlalchemy import utils as oslodbutils
 from sqlalchemy.exc import OperationalError
 from sqlalchemy.ext.compiler import compiles
 from sqlalchemy import MetaData

nova/i18n.py

@@ -18,11 +18,11 @@ See http://docs.openstack.org/developer/oslo.i18n/usage.html .
 
 """
 
-from oslo import i18n
+import oslo_i18n
 
 DOMAIN = 'nova'
 
-_translators = i18n.TranslatorFactory(domain=DOMAIN)
+_translators = oslo_i18n.TranslatorFactory(domain=DOMAIN)
 
 # The primary translation function using the well-known name "_"
 _ = _translators.primary
@@ -39,8 +39,8 @@ _LC = _translators.log_critical
 
 
 def translate(value, user_locale):
-    return i18n.translate(value, user_locale)
+    return oslo_i18n.translate(value, user_locale)
 
 
 def get_available_languages():
-    return i18n.get_available_languages(DOMAIN)
+    return oslo_i18n.get_available_languages(DOMAIN)

nova/scheduler/filters/aggregate_image_properties_isolation.py

@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from oslo.config import cfg
+from oslo_config import cfg
 
 from nova.openstack.common import log as logging
 from nova.scheduler import filters

nova/test.py

@@ -31,10 +31,10 @@ import mock
 import os
 
 import fixtures
-from oslo.config import cfg
-from oslo.config import fixture as config_fixture
-from oslo.utils import timeutils
 from oslo_concurrency import lockutils
+from oslo_config import cfg
+from oslo_config import fixture as config_fixture
+from oslo_utils import timeutils
 from oslotest import moxstubout
 import six
 import testtools

nova/tests/fixtures.py

@@ -24,8 +24,8 @@ import uuid
 import warnings
 
 import fixtures
-from oslo.config import cfg
-from oslo.messaging import conffixture as messaging_conffixture
+from oslo_config import cfg
+from oslo_messaging import conffixture as messaging_conffixture
 
 from nova.db import migration
 from nova.db.sqlalchemy import api as session

nova/tests/unit/objects/test_aggregate.py

@@ -13,7 +13,7 @@
 #    under the License.
 
 import mock
-from oslo.utils import timeutils
+from oslo_utils import timeutils
 
 from nova import db
 from nova import exception

nova/tests/unit/policy_fixture.py

@@ -15,8 +15,8 @@
 import os
 
 import fixtures
-from oslo.config import cfg
-from oslo.serialization import jsonutils
+from oslo_config import cfg
+from oslo_serialization import jsonutils
 
 from nova.openstack.common import policy as common_policy
 import nova.policy

nova/utils.py

@@ -36,13 +36,13 @@ from xml.sax import saxutils
 
 import eventlet
 import netaddr
-from oslo.config import cfg
-from oslo import messaging
-from oslo.utils import excutils
-from oslo.utils import importutils
-from oslo.utils import timeutils
 from oslo_concurrency import lockutils
 from oslo_concurrency import processutils
+from oslo_config import cfg
+import oslo_messaging as messaging
+from oslo_utils import excutils
+from oslo_utils import importutils
+from oslo_utils import timeutils
 import six
 
 from nova import exception