Fix assembling RAID volume by using incremental

Fix assembling RAID volume by using incremental

After change "mdadm: remove container_enough logic"
IMSM volumes are started immediately. If volume is during
reshape, then it will be blocked by block_subarray() during
first mdadm -I <devname>. Assemble_container_content() for
next disk will see the change because metadata version from
sysfs and metadata doesn't match and will execute
sysfs_set_array again. Then it fails to set same
component_size, it is prohibited by kernel.

If array is frozen then first sign from metadata version
is different ("/" vs "-"), so exclude it from comparison.
All we want is to double check that base properties are set
and we don't need to call sysfs_set_array again.

Signed-off-by: Pawel Piatkowski <pawel.piatkowski@intel.com>
Signed-off-by: Jes Sorensen <jes@trained-monkey.org>