Use oslo-config-2013.1b4

The cfg API is now available via the oslo-config library, so switch to
it and remove the copied-and-pasted version.

Add the 2013.1b4 tarball to tools/pip-requires - this will be changed
to 'oslo-config>=2013.1' when oslo-config is published to pypi. This
will happen in time for grizzly final.

Add dependency_links to setup.py so that oslo-config can be installed
from the tarball URL specified in pip-requires.

Remove the 'deps = pep8==1.3.3' from tox.ini as it means all the other
deps get installed with easy_install which can't install oslo-config
from the URL.

Make tools/hacking.py include oslo in IMPORT_EXCEPTIONS like it already
does for paste. It turns out imp.find_module() doesn't correct handle
namespace packages.

Retain dummy cfg.py file until keystoneclient middleware has been
updated (I18c450174277c8e2d15ed93879da6cd92074c27a).

Change-Id: I4815aeb8a9341a31a250e920157f15ee15cfc5bc

nova/tests/baremetal/db/base.py

@@ -15,8 +15,9 @@
 
 """Bare-metal DB test base class."""
 
+from oslo.config import cfg
+
 from nova import context as nova_context
-from nova.openstack.common import cfg
 from nova import test
 from nova.virt.baremetal.db import migration as bm_migration
 from nova.virt.baremetal.db.sqlalchemy import session as bm_session

nova/tests/baremetal/test_driver.py

@@ -20,8 +20,9 @@
 
 """Tests for the base baremetal driver class."""
 
+from oslo.config import cfg
+
 from nova import exception
-from nova.openstack.common import cfg
 from nova import test
 from nova.tests.baremetal.db import base as bm_db_base
 from nova.tests.baremetal.db import utils as bm_db_utils

nova/tests/baremetal/test_ipmi.py

@@ -23,7 +23,8 @@ import os
 import stat
 import tempfile
 
-from nova.openstack.common import cfg
+from oslo.config import cfg
+
 from nova import test
 from nova.tests.baremetal.db import utils as bm_db_utils
 from nova import utils

nova/tests/baremetal/test_pxe.py

@@ -21,10 +21,10 @@
 
 import os
 
+from oslo.config import cfg
 from testtools import matchers
 
 from nova import exception
-from nova.openstack.common import cfg
 from nova.openstack.common.db.sqlalchemy import session as db_session
 from nova.tests.baremetal.db import base as bm_db_base
 from nova.tests.baremetal.db import utils as bm_db_utils

nova/tests/baremetal/test_virtual_power_driver.py

@@ -19,16 +19,14 @@
 """Tests for baremetal virtual power driver."""
 
 import mox
+from oslo.config import cfg
 
 from nova import exception
-from nova.openstack.common import cfg
-from nova import utils as nutils
-
 from nova.tests.baremetal.db import base as bm_db_base
 from nova.tests.baremetal.db import utils as bm_db_utils
 from nova.tests.image import fake as fake_image
 from nova.tests import utils
-
+from nova import utils as nutils
 from nova.virt.baremetal import db
 from nova.virt.baremetal import virtual_power_driver
 import nova.virt.powervm.common as connection

nova/tests/baremetal/test_volume_driver.py

@@ -15,9 +15,9 @@
 
 """Tests for baremetal volume driver."""
 
-from nova.openstack.common import cfg
-from nova import test
+from oslo.config import cfg
 
+from nova import test
 from nova.virt.baremetal import volume_driver
 
 CONF = cfg.CONF

nova/virt/baremetal/db/api.py

@@ -42,9 +42,9 @@ these objects be simple dictionaries.
 
 """
 
-from nova.openstack.common import cfg
-from nova import utils
+from oslo.config import cfg
 
+from nova import utils
 
 # NOTE(deva): we can't move baremetal_db_backend into an OptGroup yet
 #             because utils.LazyPluggable doesn't support reading from

nova/virt/baremetal/db/sqlalchemy/session.py

@@ -19,7 +19,8 @@
 
 """Session Handling for SQLAlchemy backend."""
 
-from nova.openstack.common import cfg
+from oslo.config import cfg
+
 from nova.openstack.common.db.sqlalchemy import session as nova_session
 from nova import paths
 

nova/virt/baremetal/driver.py

@@ -21,10 +21,11 @@
 A driver for Bare-metal platform.
 """
 
+from oslo.config import cfg
+
 from nova.compute import power_state
 from nova import context as nova_context
 from nova import exception
-from nova.openstack.common import cfg
 from nova.openstack.common.db.sqlalchemy import session as db_session
 from nova.openstack.common import importutils
 from nova.openstack.common import log as logging

nova/virt/baremetal/ipmi.py

@@ -25,8 +25,9 @@ import os
 import stat
 import tempfile
 
+from oslo.config import cfg
+
 from nova import exception
-from nova.openstack.common import cfg
 from nova.openstack.common import log as logging
 from nova import paths
 from nova import utils

nova/virt/baremetal/pxe.py

@@ -22,9 +22,10 @@ Class for PXE bare-metal nodes.
 
 import os
 
+from oslo.config import cfg
+
 from nova.compute import instance_types
 from nova import exception
-from nova.openstack.common import cfg
 from nova.openstack.common.db.sqlalchemy import session as db_session
 from nova.openstack.common import fileutils
 from nova.openstack.common import log as logging
@@ -32,7 +33,6 @@ from nova.virt.baremetal import base
 from nova.virt.baremetal import db
 from nova.virt.baremetal import utils as bm_utils
 
-
 pxe_opts = [
     cfg.StrOpt('deploy_kernel',
                help='Default kernel image ID used in deployment phase'),

nova/virt/baremetal/vif_driver.py

@@ -13,9 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from oslo.config import cfg
+
 from nova import context
 from nova import exception
-from nova.openstack.common import cfg
 from nova.openstack.common import log as logging
 from nova.virt.baremetal import db as bmdb
 

nova/virt/baremetal/virtual_power_driver.py

@@ -17,9 +17,9 @@
 #
 # Virtual power driver
 
+from oslo.config import cfg
 
 from nova import exception
-from nova.openstack.common import cfg
 from nova.openstack.common import importutils
 from nova.openstack.common import log as logging
 from nova import utils

nova/virt/baremetal/volume_driver.py

@@ -18,9 +18,10 @@
 
 import re
 
+from oslo.config import cfg
+
 from nova import context as nova_context
 from nova import exception
-from nova.openstack.common import cfg
 from nova.openstack.common import importutils
 from nova.openstack.common import log as logging
 from nova import utils