Dropping Fedora 21 engine builds on master / 3.6 on July 31

Hi, since Fedora 21 is not going to be officially supported in 3.6 / master, in order to save resources for our CI systems we're going to drop builds for engine related packages starting from July 31. You may still continue developing engine on Fedora 21 by manually building required dependencies or you may upgrade to Fedora 22 and receive nightly builds by CI system. Note that VDSM related projects will still continue to be built in CI as long as VDSM team supports it. Thanks -- Sandro Bonazzola Better technology. Faster innovation. Powered by community collaboration. See how it works at redhat.com