[jenkins] new baremetal jenkins slave was added

fyi, new bare-metal slave has been added to jenkins - jenkins-slave-host03.ovirt.org running f20. after some initial verification it will be added to the fedora20 label to participate in running all relevant jobs. it has been puppetized and added to foreman with the new jnlp puppet class (which was missing the slave.jar, so class should be updated). enjoy, Eyal.