1) Use docker-maven-plugin to create and push docker images to repository instead creating and managing bash script which will improve code maintainability 

    See below for example

• https://github.com/spotify/docker-maven-plugin
• https://github.com/fabric8io/docker-maven-plugin 

2) ALL common packages in policy framework i.e. PDP-X, PDP-D etc,  can be extracted to a common image and extended by all modules in PF