Hello everybody,
in most cases it is useful to manage the service of foreman_proxy by default, but in some cases it might also be useful, if the service is not managed by the puppet modul e.g if you want to run foreman_proxy on a ha-cluster and the service should not be managed by puppet.
Because of this, I added an parameter to the puppet modul of foreman_proxy and created a pull request: add parameter to mange service by chr1s692 · Pull Request #809 · theforeman/puppet-foreman_proxy · GitHub
Perhaps someone can review these changes and it could be merged? 
If something is missing or did not match your development workflow please let me know, so I can correct or add something
Kind regards