Change Docker-Maven plugin to Google JiB

To distribute docker images we are currently using the Docker-Maven plugin, written in 2014 and currently deprecated

An ideal solution moving forward would be to use JiB, which is a similar, open source plugin, both for Maven and Gradle, made by Google in 2017 and actively supported.

Similar updates have already happened in other C2MON projects, such as the C2MON-Web-UI and soon possibly C2MON itself, once c2mon/c2mon#245 is resolved