[PATCH] Changes for using md on top isw format

[Jacek Danecki <Jacek Danecki intel com>]

Hi,

This series of 6 patches obsoletes patches sent in topic "Changes for using mdadm for isw_raid_member".
All patches were rebased to the version anaconda-11.5.0.42.1.
These patches need pyparted >= 2.0.11 and patch for mdadm which add support for -E --export option. 

MD containers and arrays are created in directory /dev/md as links to devices in /dev
Activation of MD arrays is done by adding disks to the array using command mdadm -I.
MDRaidArrayDevice._devDir value was changed to "/dev/md"
MD arrays are visible as HARD Drives, and can be partitioned. MD containers are displayed as RAID Devices.
Support for new kernel parameter iswmd was changed.

Please review.
Regards