Drop use of 'oslo' namespace package.

The Oslo libraries have moved all of their code out of the 'oslo'
namespace package into per-library packages. The namespace package was
retained during kilo for backwards compatibility, but will be removed by
the liberty-2 milestone. This change removes the use of the namespace
package, replacing it with the new package names.

The patches in the libraries will be put on hold until application
patches have landed, or L2, whichever comes first. At that point, new
versions of the libraries without namespace packages will be released as
a major version update.

Please merge this patch, or an equivalent, before L2 to avoid problems
with those library releases.

Blueprint: remove-namespace-packages
https://blueprints.launchpad.net/oslo-incubator/+spec/remove-namespace-packages

Change-Id: I950f1afb1b4600dfc1f38d1a7d9322f240f444a6

cinder/openstack/common/config/generator.py

@@ -27,8 +27,8 @@ import socket
 import sys
 import textwrap
 
-from oslo.config import cfg
-from oslo.utils import importutils
+from oslo_config import cfg
+from oslo_utils import importutils
 import six
 import stevedore.named
 

cinder/openstack/common/periodic_task.py

@@ -16,7 +16,7 @@ import logging
 import random
 import time
 
-from oslo.config import cfg
+from oslo_config import cfg
 import six
 
 from cinder.openstack.common._i18n import _, _LE, _LI

cinder/openstack/common/scheduler/filters/extra_specs_ops.py

@@ -15,7 +15,7 @@
 
 import operator
 
-from oslo.utils import strutils
+from oslo_utils import strutils
 
 # 1. The following operations are supported:
 #   =, s==, s!=, s>=, s>, s<=, s<, <in>, <is>, <or>, ==, !=, >=, <=

cinder/openstack/common/scheduler/filters/json_filter.py

@@ -15,7 +15,7 @@
 
 import operator
 
-from oslo.serialization import jsonutils
+from oslo_serialization import jsonutils
 import six
 
 from cinder.openstack.common.scheduler import filters