ceilometer 9.0.0 release

meta:version: 9.0.0
meta:diff-start: -
meta:series: pike
meta:release-type: release
meta:pypi: no
meta:first: yes
meta:release:Author: Julien Danjou <julien@danjou.info>
meta:release:Commit: Julien Danjou <julien@danjou.info>
meta:release:Change-Id: I8bfc6720221096f31fed59056393a2303fd459a8
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Code-Review+2: Doug Hellmann <doug@doughellmann.com>
meta:release:Workflow+1: Doug Hellmann <doug@doughellmann.com>
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