Add ABRT plugins and a dependency

rubygem-foreman_abrt
rubygem-smart_proxy_abrt
rubygem-satyr

NOTE: I used `smart_proxy_pulp` as a template, which is added under `foreman-plugins-nightly-rhel6` in `tito.props`. If I understand correctly the rhel6 plugins are built in `ruby193` collection, however the proxy itself is built without the collection - won't it lead to problems?
The permissions on this file are too relaxed for cron:

    Aug 20 11:46:01 foreman crond[1317]: (root) BAD FILE MODE (/etc/cron.d/rubygem-smart_proxy_abrt)

They're 0664, like all the other files in this package - maybe set a default file mode in the %files declaration to be 644?