[IMPROVEMENT] Generate configuration snippets

[aborroy]

Currently only keystores are provided.

Improvement

Add the ability to get configuration snippets for Repository, Tomcat, SOLR and Jetty using generated keystores

[hi-ko]

wouln't it be better to create a script/function instead which automatically updates the required configs on the runtime system based on env variables set?
containers and/or VMs then only need to run that script on startup and expects at least the default variables set which then could be overwritten. s. #24