Unused imports cleanup

[Zhongyue Luo]

Clean up unused imports found by pylint

find . -type f -name "*py" -exec ../.venv/bin/pylint -r n {} \; | grep -E "Unused imp|^\*"

************* Module volume.manager
W: 53,0: Unused import volume_types
W: 50,0: Unused import rpc
************* Module test
W: 28,0: Unused import shutil
W: 27,0: Unused import os
************* Module image.s3
W: 39,0: Unused import rpc
************* Module network.api
W: 21,0: Unused import exception
W: 26,0: Unused import rpc_common
************* Module network.l3
W: 18,0: Unused import random
************* Module network.quantum.fake_client
W: 19,0: Unused import copy
************* Module network.quantum.client
W: 20,0: Unused import json
************* Module api.openstack.compute.contrib.certificates
W: 26,0: Unused import rpc
************* Module api.sizelimit
W: 24,0: Unused import context
************* Module db.sqlalchemy.migrate_repo.versions.084_quotas_unlimited
W: 18,0: Unused import migrate
************* Module db.sqlalchemy.migrate_repo.versions.096_recreate_dns_domains
W: 18,0: Unused import select
************* Module db.sqlalchemy.migrate_repo.versions.082_essex
W: 23,0: Unused import Set
************* Module tests.glance.stubs
W: 22,0: Unused import exception
************* Module tests.test_flags
W: 21,0: Unused import tempfile
W: 20,0: Unused import os
************* Module tests.test_nova_manage
W: 19,0: Unused import json
************* Module tests.integrated.test_extensions
W: 18,0: Unused import extensions
************* Module tests.consoleauth.test_consoleauth
W: 32,0: Unused import utils
W: 27,0: Unused import db
W: 30,0: Unused import importutils
************* Module tests.test_log
W: 4,0: Unused import sys
************* Module tests.network.test_manager
W: 26,0: Unused import flags
************* Module tests.test_xenapi
W: 31,0: Unused import vm_states
W: 25,0: Unused import mox
W: 30,0: Unused import task_states
************* Module tests.test_libvirt_vif
W: 22,0: Unused import firewall
W: 24,0: Unused import connection
************* Module tests.api.openstack.test_wsgi
W: 12,0: Unused import utils
W: 8,0: Unused import nova
W: 4,0: Unused import json
************* Module tests.api.openstack.compute.test_flavors
W: 30,0: Unused import utils
************* Module tests.api.openstack.compute.test_extensions
W: 33,0: Unused import utils
************* Module tests.api.openstack.compute.contrib.test_scheduler_hints
W: 20,0: Unused import wsgi
W: 19,0: Unused import extensions
************* Module tests.api.openstack.compute.contrib.test_floating_ips
W: 27,0: Unused import rpc_common
************* Module tests.api.openstack.compute.contrib.test_disk_config
W: 22,0: Unused import wsgi
W: 21,0: Unused import extensions
************* Module tests.api.ec2.test_ec2_validate
W: 23,0: Unused import inst_state
W: 22,0: Unused import ec2utils
W: 26,0: Unused import vm_states
W: 24,0: Unused import power_state
W: 19,0: Unused import webob
************* Module tests.test_libvirt
W: 24,0: Unused import sys
************* Module tests.fake_network
W: 24,0: Unused import fake_network_cache_model
************* Module tests.test_melange_ipam_lib
W: 19,0: Unused import exception
************* Module tests.scheduler.test_filter_scheduler
W: 26,0: Unused import test
************* Module tests.scheduler.test_scheduler
W: 32,0: Unused import notifications
************* Module tests.test_imagecache
W: 31,0: Unused import image
************* Module tests.rpc.test_common
W: 30,0: Unused import common
W: 23,0: Unused import context
W: 27,0: Unused import rpc_amqp
************* Module tests.test_utils
W: 30,0: Unused import lockfile
************* Module wsgi
W: 36,0: Unused import utils
************* Module scheduler.driver
W: 37,0: Unused import rpc_common
************* Module scheduler.filters.trusted_filter
W: 56,0: Unused import utils
************* Module notifier.api
W: 16,0: Unused import inspect
************* Module vnc.xvp_proxy
W: 34,0: Unused import rpc
************* Module compute.api
W: 50,0: Unused import rpc
W: 45,0: Unused import cfg
************* Module compute.utils
W: 19,0: Unused import nova
W: 27,0: Unused import utils
W: 24,0: Unused import network_model
W: 23,0: Unused import network
************* Module virt.baremetal.tilera
W: 25,0: Unused import os
************* Module virt.libvirt.connection
W: 49,0: Unused import time
************* Module virt.libvirt.imagecache
W: 31,0: Unused import compute
W: 32,0: Unused import db_context
************* Module virt.libvirt.firewall
W: 24,0: Unused import db
W: 23,0: Unused import context
W: 30,0: Unused import netutils
W: 27,0: Unused import utils
************* Module virt.xenapi.vmops
W: 36,0: Unused import vm_states
W: 35,0: Unused import task_states
************* Module virt.xenapi.volume_utils
W: 30,0: Unused import utils
W: 26,0: Unused import db
W: 27,0: Unused import exception
W: 25,0: Unused import context
************* Module virt.images
W: 24,0: Unused import errno
************* Module virt.vmwareapi_conn
W: 40,0: Unused import db
W: 39,0: Unused import context
************* Module rpc.common
W: 25,0: Unused import cfg
W: 22,0: Unused import sys
************* Module testing.runner
W: 78,0: Unused import cfg
W: 76,0: Unused import flags

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/8095

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/8095
Committed: http://github.com/openstack/nova/commit/6228acd7ff3b20460d8c6fae9ab7c773ab38529a
Submitter: Jenkins
Branch: master

commit 6228acd7ff3b20460d8c6fae9ab7c773ab38529a
Author: Zhongyue Luo <email address hidden>
Date: Sun Jun 3 13:23:11 2012 +0800

    Unused imports cleanup (folsom-2)

    Fixes bug #1008023

    Change-Id: Ifb8ecbb7430fdabd7b5d81ab23df66942abd9cb7