Switch from oslo.* libs to oslo_*

The oslo team is recommending everyone to switch to the
non-namespaced versions of libraries.

Change-Id: I7f641a56f61e307e1cf0d57b85ab72f401db6f6c

refstack/api/app.py

@@ -19,7 +19,7 @@ import json
 import logging
 import os
 
-from oslo.config import cfg
+from oslo_config import cfg
 import pecan
 from pecan import hooks
 import webob

refstack/db/api.py

@@ -20,8 +20,8 @@ Call these functions from refstack.db namespace, not the refstack.db.api
 namespace.
 
 """
-from oslo.config import cfg
-from oslo.db import api as db_api
+from oslo_config import cfg
+from oslo_db import api as db_api
 
 
 db_opts = [

refstack/db/migrations/alembic/migration.py

@@ -20,7 +20,7 @@ import os
 import alembic
 from alembic import config as alembic_config
 import alembic.migration as alembic_migration
-from oslo.config import cfg
+from oslo_config import cfg
 
 from refstack.db.sqlalchemy import api as db_api
 

refstack/db/sqlalchemy/api.py

@@ -18,9 +18,9 @@ Implementation of SQLAlchemy backend.
 import sys
 import uuid
 
-from oslo.config import cfg
-from oslo.db import options as db_options
-from oslo.db.sqlalchemy import session as db_session
+from oslo_config import cfg
+from oslo_db import options as db_options
+from oslo_db.sqlalchemy import session as db_session
 
 from refstack.db.sqlalchemy import models
 

refstack/db/sqlalchemy/models.py

@@ -19,9 +19,9 @@ SQLAlchemy models for Refstack data.
 
 import datetime
 
-from oslo.config import cfg
-from oslo.db.sqlalchemy import models
-from oslo.utils import timeutils
+from oslo_config import cfg
+from oslo_db.sqlalchemy import models
+from oslo_utils import timeutils
 import sqlalchemy as sa
 from sqlalchemy import orm
 from sqlalchemy.ext.declarative import declarative_base

refstack/db/utils.py

@@ -17,7 +17,7 @@
 
 import logging
 
-from oslo.config import cfg
+from oslo_config import cfg
 
 CONF = cfg.CONF
 LOG = logging.getLogger(__name__)

refstack/tests/api/__init__.py

@@ -19,7 +19,7 @@ import os
 
 import alembic
 import alembic.config
-from oslo.config import cfg
+from oslo_config import cfg
 import sqlalchemy as sa
 import sqlalchemy.exc
 from unittest import TestCase