Description of problem: perl-Class-Trigger is part of rhel6 so it must be retired on epel6.
Retired, ticket opened to block in EPEL6.
perl-Class-Trigger-0.13-0.2.1.el6 has been submitted as an update for Fedora EPEL 6. https://admin.fedoraproject.org/updates/perl-Class-Trigger-0.13-0.2.1.el6
perl-Class-Trigger-0.13-0.2.1.el6 has been pushed to the Fedora EPEL 6 stable repository.