MD: when RAID journal is missing/faulty, block RESTART_ARRAY_RW
MD: when RAID journal is missing/faulty, block RESTART_ARRAY_RW

When RAID-4/5/6 array suffers from missing journal device, we put
the array in read only state. We should not allow trasition to
read-write states (clean and active) before replacing journal device.

Signed-off-by: Song Liu <a7d9c9762c730be0dd2760d11973972f3eeeff9d@fb.com>
Signed-off-by: Shaohua Li <c0c0c8857ed6ec93282de3ee9d47e224acf995af@fb.com>
Signed-off-by: NeilBrown <1c00aa603bb92d594c03cff60ecf8e63b2a5bcb1@suse.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs