Install grinder is great for testing UI-based installation, but for a headless approach, we need something w/o UI.

Thus, use existing scripts such as

https://github.com/jbosstools/jbosstools-build-ci/blob/master/util/installAndDisplayCompositeSiteContent.sh
http://download.jboss.org/jbosstools/updates/scripted-install/director.xml

to create a new headless matrix job.