ceilometer devstack plugin should remove /etc/ceilometer and /var/log/ceilometer-api directory when clean is called

[ZhiQiang Fan]

if we don't clean those directory and files, then next run to test devstack plugin may succeed even with a broken change, which is not good for developers

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/249114

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/249114
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=af85965f555928e6d9897b69ab8de687008b08eb
Submitter: Jenkins
Branch: master

commit af85965f555928e6d9897b69ab8de687008b08eb
Author: ZhiQiang Fan <email address hidden>
Date: Wed Nov 25 01:45:20 2015 +0800

    remove config files when run clean.sh

    Currently we don't remove Ceilometer config files when ./clean.sh
    is run, which should be fixed because it will bite developers when
    they test change related to devstack script.

    Note, this patch also removes ceilometer api log files when WSGI
    is not enabled.

    Change-Id: I3fd62787708cf64d1860b2b64d25773e79b17fe9
    Closes-Bug: #1509253

[Thierry Carrez (ttx)]

This issue was fixed in the openstack/ceilometer 6.0.0.0b1 development milestone.