This commit cleans up the existing CI scripts a bit while adding jobs to
build RPM packages. The directory structure allows for easily adding
RPM outputs will only be uploaded on tagged commits.
We don't need to keep the whole build image - let's just copy the
required files into an openjdk8 container, thus reducing the size.
Special thanks to @jonas for the template for the final image, as well
as the push to get it added. :)
Adds simple jobs for building the the Engine for Debian 10.
Pre-built docker images containing des will be pulled down and used
to build the Adapter.
Upon successful compilation an image containing the build output will be
pushed to a docker registry.