need to migrate off oslo-incubator as it is deprecated

[Guang Yee]

While investigating a Jenkins failure, I've noticed that Ceilometer is still using os-incubator code.

http://logs.openstack.org/67/207267/1/check/gate-tempest-dsvm-neutron-src-python-keystoneclient/2232dd4/logs/screen-ceilometer-api.txt.gz

See

https://github.com/openstack/ceilometer/blob/master/ceilometer/api/controllers/v2/root.py#L21

Please move off keystoneclient.openstack.common and use the keystoneclient.exceptions instead.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/209402

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/209402
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=08825e46db0fbc921224ab350e0640b0207c42b1
Submitter: Jenkins
Branch: master

commit 08825e46db0fbc921224ab350e0640b0207c42b1
Author: Julien Danjou <email address hidden>
Date: Wed Aug 5 10:43:40 2015 +0200

    Stop using openstack.common from keystoneclient

    They switched away from it.

    Change-Id: Iea7fd67d764443dfb6e7192ab3dff475bc2e3095
    Closes-Bug: #1481501