As a fedora-infra member, I want to have fedora-messaging's packaging automated.

[StephenCoady]

Acceptance Criteria

• packit.yml is added to the project
• once added, we can successfully create released rpms for fedora-messaging
• https://src.fedoraproject.org/rpms/fedora-messaging is updated by packit

[jpopelka]

Hasn't this been solved by #259? Is there anything missing? Do you need any help from the Packit team?