useless urllib3 connection info in CLI

[Liusheng]

Use the latest pytthon-neutronclient, the useless urllib3 connection info will be printed in CLI :
e.g.

root@devstack:/opt/stack/ceilometer# neutron net-list
Starting new HTTP connection (1): 127.0.0.1
Starting new HTTP connection (1): 127.0.0.1
Starting new HTTP connection (1): 127.0.0.1
+--------------------------------------+---------+----------------------------------------------------+
| id | name | subnets |
+--------------------------------------+---------+----------------------------------------------------+
| b8ac85ba-36dc-4ab6-b1bd-45693c5ed386 | private | 23b95138-07e1-4f80-9fdb-58d378b86e23 10.0.0.0/24 |
| fbb32566-2ea8-46e0-bcbb-4ec39d447732 | public | 865cc297-1d59-4c24-9c07-bc9c5fc92665 172.24.4.0/24 |
+--------------------------------------+---------+----------------------------------------------------+

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/102080

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/102080
Committed: https://git.openstack.org/cgit/openstack/python-neutronclient/commit/?id=85cb5300889d17e779b2a300cf2ff4c9b8574f87
Submitter: Jenkins
Branch: master

commit 85cb5300889d17e779b2a300cf2ff4c9b8574f87
Author: liu-sheng <email address hidden>
Date: Tue Jun 24 09:53:17 2014 +0800

    Silences the output in CLI for connection info

    This change try to reduce the useless urllib3 connection info in
    CLI by set the log level of urllib3.connectionpool.

    Change-Id: I9d21d29ae0274133099dd05a14e5211d77ffe721
    Closes-Bug: #1333485