Ceilometer Release Notes in ceilometer - Rocky release notes missing

[Bernd Bausch]

- [X] This doc is inaccurate in this way:

Rocky release notes are missing, although there have been significant changes in Rocky (see http://lists.openstack.org/pipermail/release-announce/2018-July.txt).

- [ ] This is a doc addition request.
- [ ] I have a fix to the document that I can paste below including example: input and output.

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Release: on 2017-10-16 11:31:51
SHA: cf9a4cb0bc3bbbd6fc69844ef7e562996d0abde6
Source: https://opendev.org/openstack/ceilometer/src/releasenotes/source/index.rst
URL: https://docs.openstack.org/releasenotes/ceilometer/