Arthur,
If you just want to deploy to any public repo, you can create a snapshots Jenkins job to release into Eclipse snapshots repository. Just clone one of the snapshot jobs such as
BOM-maven-snapshots and modify it for open-api.
If you want to release a milestone, candidate or final version, you can deploy them to Maven Central with the
MicroProfile Releases job - I added the open-api module to the select box. Just "Build with Parameters", specify parameters and press Build.
To log into Jenkins, use the same credentials as with your Eclipse account.
--Ondro