ceilometermiddleware 1.5.0 release

meta:version: 1.5.0
meta:diff-start: -
meta:series: train
meta:release-type: release
meta:pypi: yes
meta:first: yes
meta:release:Author: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Commit: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Change-Id: I1a199c96e165c82b96be0d2b049cd7b2dc464bb1
meta:release:Code-Review+1: Trinh Nguyen <dangtrinhnt@gmail.com>
meta:release:Code-Review+2: Kendall Nelson <kennelson11@gmail.com>
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Workflow+1: Sean McGinnis <sean.mcginnis@gmail.com>
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