Allow host group titles in safe mode
As part of https://github.com/theforeman/foreman_ansible/pull/299 I want host group titles to be available within the template and thus in the generated report.
I'm aware of the fact that host group names are available in the safe mode, but there is no way to get the nesting, e.g. what nesting has a certain host group. The easiest way is to reuse titles (which are used in UI).