Allow configuring proxy_host and proxy_port in nova.conf

[Sridhar Gaddam]

Following patch I2d46b926f1c895aba412d84b4ee059fda3df9011,
proxy_host/proxy_port configured in nova.conf or passed via
command line are not taking effect for novncproxy, spicehtmlproxy
and serial proxy.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/158327

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/158327
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=8f060f07c7eeb1d1356f0ce6c0e1ca6ec4ec0b96
Submitter: Jenkins
Branch: master

commit 8f060f07c7eeb1d1356f0ce6c0e1ca6ec4ec0b96
Author: sridhargaddam <email address hidden>
Date: Mon Feb 23 14:59:52 2015 +0000

    Allow configuring proxy_host and proxy_port in nova.conf

    Following patch I2d46b926f1c895aba412d84b4ee059fda3df9011, if
    proxy_host/proxy_port is configured in nova.conf or passed via
    command line, they are not taking effect for novncproxy, spice
    htmlproxy and serial proxy. This patch fixes the issue by
    parsing the arguments before calling baseproxy.

    Closes-Bug: #1424647
    Change-Id: I183309d7f0a3b86881f05e7fe65d1399170b5a3d