Metadata is not modified by metadata preparation handler.
It has to be read again from array.
There is 2 read required:
1. before 'for' entry to get updated information after reshape_super() call
2. inside 'for' loop to get updated information for every processed array
(it can happen /i.e. imsm case/ that container operation is a set of array operations
and information in metadata is changed after every loop).
Signed-off-by: Adam Kwolek <adam.kwolek@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>