Moving F21 slaves offline / disabling failing F21 jenkins jobs

Hi, since Fedora 21 slaves are causing several failures on jobs that works fine on other slaves and some Fedora 21 jobs like ovirt-engine and reports build are known to fail on F21, we're going to disable them until the known issues will be fixed. Thanks, -- Sandro Bonazzola Better technology. Faster innovation. Powered by community collaboration. See how it works at redhat.com