metadata namespace_proxy missing help information for options

[ZhiQiang Fan]

When i use `neutron-ns-metadata-proxy --help`, some option doesn't have help text. It is because in neutron/agent/metadata/namespace_proxy.py:

opts = [
        cfg.StrOpt('network_id'),
        cfg.StrOpt('router_id'),
        cfg.StrOpt('pid_file'),
        cfg.BoolOpt('daemonize', default=True),
        cfg.IntOpt('metadata_port',
                   default=9697,
                   help=_("TCP Port to listen for metadata server "
                          "requests.")),
    ]

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/80816

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/80816
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=884b08e1b20a2f80fb6eba6f0c7405979b914817
Submitter: Jenkins
Branch: master

commit 884b08e1b20a2f80fb6eba6f0c7405979b914817
Author: Brandon Logan <email address hidden>
Date: Sat Mar 15 22:32:13 2014 -0500

    Added config value help text in ns metadata proxy

    Change-Id: I9d59e902cf9ed89e29d93b29912c87f2bad73c7c
    Closes-Bug: #1215270