Logging configuration file support not available

[Unmesh Gurjar]

OpenStack projects like Glance, Keystone support the log settings to be specified in a logging configuration file. Currently, Nova does not have this support.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/4152

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/4152
Committed: http://github.com/openstack/nova/commit/2f317ba79f262a8cd325844a1a258efab22e5fa1
Submitter: Jenkins
Branch: master

commit 2f317ba79f262a8cd325844a1a258efab22e5fa1
Author: Jason Kölker <email address hidden>
Date: Mon Feb 13 16:26:31 2012 -0600

    Allow file logging config

    * Fixes lp904305
    * remove module level log functions (getLogger to rule them all)
    * Move specific Environment logging to the one place it is used
    * Wrap getLogger to return a logger wrapped in a NovaContextAdapter
    * Do not overwrite the root logger
    * save_and_reraise_exception logs via error for passing exc_info
    * Uses CommonConfigOptions for compatability across Openstack Projects
    * Prefers CommonConfigOptions over legacy options
    * Install a NullHandler on the root logger if configured by FLAGS
    * Include example logging config file to mimic Nova defaults

    Change-Id: Ie59c3f755c142e2b7dc3b94b4e82e142e157bfac