Interpolate strings using logging own methods

[zhangyanxian]

String interpolation should be delayed to be handled by the logging code, rather than being done at the point of the logging call.
Ref:http://docs.openstack.org/developer/oslo.i18n/guidelines.html#log-translation
For example:
in cluster_client.py (
LOG.info(_LI('Cluster %s succeeded.') % cluster_id)

[OpenStack Infra (hudson-openstack)]

Change abandoned by zhangyanxian ([e-mail]) on branch: master
Review: https://review.openstack.org/400103
Reason: Same patch is already active: https://review.openstack.org/#/c/399840

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/401871

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/416455

[OpenStack Infra (hudson-openstack)]

Change abandoned by melissaml ([e-mail]) on branch: master
Review: https://review.openstack.org/401871

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/416455
Committed: https://git.openstack.org/cgit/openstack/magnum/commit/?id=2ee054c1f5f5cd48f007b51c600133cbad376da5
Submitter: Jenkins
Branch: master

commit 2ee054c1f5f5cd48f007b51c600133cbad376da5
Author: melissaml <[e-mail]>
Date: Wed Jan 4 15:11:33 2017 +0800

    Modify variable's using method in Log Messages

    String interpolation should be delayed to be handled by the logging code,
    rather than being done at the point of the logging call.
    Ref:http://docs.openstack.org/developer/oslo.i18n/guidelines.html#log-translation
    For example:
    LOG.info(_LI('some message: variable=%s') % variable)
    LOG.info(_LI('some message: variable=%s'), variable)

    Change-Id: Ifaf1dfe589615732e412c4e640cf46679abc9023
    Closes-Bug: #1643463

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/magnum 4.0.0 release.