rados: naming conventions: fixes in GetXattr function
rados: naming conventions: fixes in GetXattr function

Fix up variable names that don't meet Go standards.

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

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