Add foreman_templates + diffy dep

foreman_templates:
http://koji.katello.org/koji/buildinfo?buildID=7332 (el6)
http://koji.katello.org/koji/buildinfo?buildID=7333 (fc19)

diffy:
http://koji.katello.org/koji/buildinfo?buildID=7330 (el6)
http://koji.katello.org/koji/buildinfo?buildID=7331 (fc19)