We are going to use https://wiki.jenkins-ci.org/display/JENKINS/Yaml+Axis+Plugin
JJB does not support such axis. Should be straightforward looking at jenkins_jobs/modules/project_matrix.py . An example of plugin provided axis is dynamic in that file.
Upstream patches:
https://review.openstack.org/286689 | Partial support Yaml Axis Plugin | Merged and released |
https://review.openstack.org/286690 | Complete support of Yaml Axis Plugin | Merged |
https://review.openstack.org/322976 | project matrix: rename variable/refactor | Polishing patch. Merged |