Docs: Mistake in "log_file" option in zaqar documents

[Md Nadeem]

As per zaqar README.rst, if you want to change log file name then you have to edit log_file option in [DEFAULT] section of ~/.zaqar/zaqar.conf
                   log_file = server.log

However, actually to change the log file name, you have to args option in [handler_file] section in ~/.zaqar/logging.conf as below.
                    args=('zaqar.log', 'w')

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/224430
Committed: https://git.openstack.org/cgit/openstack/zaqar/commit/?id=c890e77067d8106036cd36890211cfc07eca5723
Submitter: Jenkins
Branch: master

commit c890e77067d8106036cd36890211cfc07eca5723
Author: MD NADEEM <email address hidden>
Date: Thu Sep 17 14:26:46 2015 +0900

    Correct "log_file" option in zaqar documents

    This patch provide fix for below issue
    As per zaqar README.rst, if you want to change log file name,
    then you have to edit log_file option in [DEFAULT] section of ~/.zaqar/zaqar.conf
                       log_file = server.log

    However, actually to change the log file name,
    you have to args option in [handler_file] section in ~/.zaqar/logging.conf as below.
                        args=('zaqar.log', 'w')
    Closes-bug: #1496682

    Change-Id: I94d762fca1905b367722e44cb24961e3e4cfffb0