"log to syslog" sometimes renders to "none" instead of "false"

[Ryan Beisner]

use_syslog sometimes renders to "none" instead of "false" as expected.

For Precise-Icehouse, amulet tests show:

DEBUG:runner:DEBUG:amulet-logger:Validating config file data (global in /etc/ceph/ceph.conf on cinder/0)...
DEBUG:runner:cinder ceph config error: section [global] log to syslog:none != expected log to syslog:false

[James Page (james-page)]

Confirmed:

log to syslog = none
err to syslog = none
clog to syslog = none

problem here is that the template expects a syslog flag to be populated, but this charm does not actually have a use-syslog configuration - we should add that.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/428048

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/428048
Committed: https://git.openstack.org/cgit/openstack/charm-cinder-ceph/commit/?id=799258193264fbe82327a031ea00ae936300e138
Submitter: Jenkins
Branch: master

commit 799258193264fbe82327a031ea00ae936300e138
Author: James Page <email address hidden>
Date: Thu Feb 2 09:33:11 2017 +0000

    Add use-syslog configuration option

    This config option is used in the ceph.conf template; add to
    charm configuration options to allow syslog to be enabled or
    disabled for ceph library usage.

    The existing context configuration for the charm will just
    pickup and use this configuration option, avoiding the current
    behaviour of writing out 'none' to the ceph.conf file.

    Change-Id: I40debfa5c8ee07999ed5e688e31d1c6ceffbea36
    Closes-Bug: 1604575