Fix [Error 2]No such file or directory issue when setting NFSv4 Domain.

Change-Id: I6dded758e8dc6a61c3af1ec4445ff276c61fa5eb
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=998392
Signed-off-by: hadong <hadong0720@gmail.com>