02r10_Manage_add-spare: it has 2 scenarios against manage_add-spare.
1. 2 active disks in md array, using add-spare to add spare disk.
2. 2 active disks and 1 spare in array, add-spare 1 new disk into array,
then check spares.
Signed-off-by: Zhilong Liu <zlliu@suse.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
Zhilong Liu