'Adds all names for node in nodes arg to this node\'s /etc/hosts file'

def add_to_etc_hosts(self, nodes):

    self.remove_from_etc_hosts(nodes)
    host_file = self.ssh.remote_file('/etc/hosts', 'a')
    for node in nodes:
        print >>host_file, node.get_hosts_entry()
    host_file.close()
