Fix cloud-init hostname configuration

The cloud-init `meta-data` file is in YAML format. The leading asterisk commented out the `local-hostname` option so that the hostname was never applied to the machine by cloud-init.

Author: janeczku

drivers/vmwarevsphere/cloudinit.go

@@ -154,7 +154,7 @@ func (d *Driver) createCloudInitIso() error {
 		return err
 	}
 
-	md := []byte(fmt.Sprintf("#local-hostname: %s\n", d.MachineName))
+	md := []byte(fmt.Sprintf("local-hostname: %s\n", d.MachineName))
 	if err = ioutil.WriteFile(metadata, md, perm); err != nil {
 		return err
 	}