cephfs: make statx test more robust
cephfs: make statx test more robust

The TestStatxFieldsRootDir test was assuming that the nlink count
returned by statx would be exactly 2. Make the test more robust against
varying content the root dir of the volume might have by only asserting
that the nlink be 2 or more.

Signed-off-by: John Mulligan <eda8ad33169deab44f9fe65847f99e368da6c91b@redhat.com>

ceph/go-ceph,ceph/go-ceph,ceph/go-ceph