ovirt-node-config: fix IndexError: list index out of range for "h" parameter

Change-Id: I52118b975bf7ca6a36a14d297ae5bbe6fecfdb56
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1118962
Signed-off-by: hadong <hadong@redhat.com>