Fix ads_domain fact complaining on systems where winbind is not installed
Fix ads_domain fact complaining on systems where winbind is not installed

I run winbind on RHEL6 systems and sssd on RHEL7 systems, so the RHEL7
are missing the wbinfo command that gives a nasty error in a puppet run

djjudas21/puppet-winbind,djjudas21/puppet-winbind