CephFS object fails to do a initial status update.
Operator shows the following error message in logs,
'Error while updation: Operation cannot be fulfilled on
cephfilesystems.ceph.rook.io "myfs": the object has been
modified; please apply your changes to the latest version
and try again'
Function 'updateStatus' now returns the new/updated
CephFilesystem object if successfully updated or nil.
Signed-off-by: Arun Kumar Mohan <amohan@redhat.com>