Add foreman_chef plugins and update highline

We need to build highline for F19, since there are some important fixes for installer in latest version (package built http://koji.katello.org/koji/buildinfo?buildID=7314). Also we package foreman_chef plugin (packages built here http://koji.katello.org/koji/buildinfo?buildID=7711 and here http://koji.katello.org/koji/buildinfo?buildID=7710)