e2e: correct failure logging for NFS
e2e: correct failure logging for NFS

Some of the steps still refer to CephFS, likely missed some replacements
while copy/pasting. The logging is a little confusing when messages
claim something with CephFS failed, but the test is about NFS.

Signed-off-by: Niels de Vos <7bda0c0ee7f47171cc808e9e60292cbc5d8140dd@redhat.com>

ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi