Define maven + docker verify, merge and stage jobs

This generalizes work first done for Acumos Java projects
that build a Spring-Boot application into a Docker image,
and do not need to deploy any jar libraries or POM files.

Change-Id: Id8040fe2d32ffe4f682f80ec5c4ed60327ef56bd
Signed-off-by: Lott, Christopher (cl778h) <cl778h@att.com>
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>