nfs: fix undefined variable
nfs: fix undefined variable

This is what happens when you don't run all the jobs from the CI...

Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

jtaleric/ceph-ansible,travmi/ceph-ansible,jtaleric/ceph-ansible,fgal/ceph-ansible,font/ceph-ansible,font/ceph-ansible,ceph/ceph-ansible,ceph/ceph-ansible,fgal/ceph-ansible,travmi/ceph-ansible