horizon 10.0.4 release

meta:version: 10.0.4
meta:diff-start: -
meta:series: newton
meta:release-type: release
meta:pypi: no
meta:first: no
meta:release:Author: Rob Cresswell <robert.cresswell@outlook.com>
meta:release:Commit: Rob Cresswell <robert.cresswell@outlook.com>
meta:release:Change-Id: I886cd566b48559d27615e6cc3e86fc3081dea4d5
meta:release:Code-Review+2: Alan Pevec <alan.pevec@redhat.com>
meta:release:Code-Review+2: Doug Hellmann <doug@doughellmann.com>
meta:release:Workflow+1: Doug Hellmann <doug@doughellmann.com>
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