adopt namespace-less oslo imports: leftovers

[Ronak Shah]

As of today I see:
root@openstack-ubuntu:/opt/stack/neutron# egrep -r "from oslo\." *
bin/neutron-rootwrap-xen-dom0: from oslo.rootwrap import wrapper
neutron/openstack/common/cache/_backends/memory.py:from oslo.utils import timeutils
neutron/openstack/common/cache/cache.py: from oslo.config import cfg
neutron/openstack/common/middleware/catch_errors.py:from oslo.middleware import catch_errors
neutron/openstack/common/middleware/request_id.py:from oslo.middleware import request_id
neutron/openstack/common/periodic_task.py:from oslo.config import cfg
neutron/openstack/common/service.py:from oslo.config import cfg
neutron/openstack/common/policy.py:from oslo.config import cfg
neutron/openstack/common/policy.py:from oslo.serialization import jsonutils
neutron/openstack/common/fileutils.py:from oslo.utils import excutils
neutron/openstack/common/eventlet_backdoor.py:from oslo.config import cfg
neutron/openstack/common/log.py:from oslo.config import cfg
neutron/openstack/common/log.py:from oslo.serialization import jsonutils
neutron/openstack/common/log.py:from oslo.utils import importutils
neutron/tests/unit/hacking/test_checks.py: check('from oslo.utils import importutils')

Will try to address most if not all of this

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/157214

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/157214
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=dce830671c48483fce76285b07a31bbb42e694a6
Submitter: Jenkins
Branch: master

commit dce830671c48483fce76285b07a31bbb42e694a6
Author: ronak <email address hidden>
Date: Wed Feb 18 16:50:29 2015 -0800

    adopt namespace-less oslo imports

    Changing the leftovers that I found with latest code.
    Initial review link: https://review.openstack.org/#/c/147215/

    Change-Id: I5adbed9bbe9cb6e819dd2a8a72e7fbeee06fbf00
    Closes-bug: #1423389