paths.go
func serverCdromPath(dcid, srvid, cdid string) string {
	return serverCdromColPath(dcid, srvid) + slash(cdid)
}
func serverCdromPath(dcid, srvid, cdid string) string {
	return serverCdromColPath(dcid, srvid) + slash(cdid)
}
// server_cdrom_path returns the string   "/datacenters/<dcid>/servers/<srvid>/cdroms/<cdid>"