Monitor: support spare-group manipulation for 1.x metadata.

The code for moving spares around a spare-group currently
only works for 0.90 metadata.  Generalise it for 1.x metadata
as well.

Reported-by: "Garth Snyder" <garth@grsweb.us>
Signed-off-by NeilBrown <neilb@suse.de>
4 files changed