LU-591 mdd: link ea code cleanup

LU-591 mdd: link ea code cleanup

Change-Id: I7504a2a3ae540471ef37d75e46ca0d7cf9d8a9f5
Xyratex-bug-id: MRP-139
Reviewed-by: Alexey Lyashkov <alexey_lyashkov@xyratex.com>
Reviewed-by: Nathan Rutman <Nathan_Rutman@xyratex.com>
Signed-off-by: Vitaly Fertman <vitaly_fertman@xyratex.com>
Reviewed-on: http://review.whamcloud.com/1230
Tested-by: Hudson
Reviewed-by: Fan Yong <yong.fan@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>