Do not download Boot2Docker when an existing template is specified

xenserver/xenserver.go

@@ -320,10 +320,12 @@ func (d *Driver) Create() error {
 
 	d.setMachineNameIfNotSet()
 
+	if d.osTemplateLabelName == "Other install media" {
 		b2dutils := mcnutils.NewB2dUtils(d.StorePath)
 		if err := b2dutils.CopyIsoToMachineDir(d.Boot2DockerURL, d.MachineName); err != nil {
 			return err
 		}
+	}
 
 	log.Infof("Logging into XenServer %s...", d.Server)
 	c, err := d.GetXenAPIClient()