My problem is that I don't believe you can use docker without using containers. And if you want to simplify pipeline, why not just use rpm-maven-plugin[1] you can easily deploy including dependencies, it is fast, you can easily upgrade or downgrade. And no need to trying to figure complexities imposed due to involving LXC.
[1] http://mojo.codehaus.org/rpm-maven-plugin/ (the website does not seem to be available at this moment due to recent CodeHaus shutdown)