cephfs: include cephfs_test.go in cephfs package
cephfs: include cephfs_test.go in cephfs package

This will allow us to test private functions from the cephfs package
int our test file.

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

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