Full review (do not merge)

Like the following?
```
%global foreman_proxy_dir /usr/share/foreman-proxy
%global foreman_proxy_bundlerd_dir %{foreman_proxy_dir}/bundler.d
%global foreman_proxy_pluginconf_dir %{_sysconfdir}/foreman-proxy/settings.d
%global spool_dir /var/spool/foreman-proxy-abrt
```
I haven't been able to find any macro for spool directory on my system.