Add foreman instance unique ID
The best way to put it would be a setting (easily viewed, ready to be changed if something went wrong e.t.c).
This introduces a persisted randomly generated identifier of the Foreman
instance. This is useful for correlating foreman-debug tarballs with
other debugging data that users upload to developers when they need
can be also useful to identify multiple instances in external systems,
when workflows across multiple Foremans are orchestrated.