LU-977 lod: Patch to protect lqr_start_idx

LU-977 lod: Patch to protect lqr_start_idx

Protect lqr_start_idx to avoid the imblance in allocating objects
on OSTs with round-robin algorithm

Signed-off-by: Rahul Deshmukh <rahul.deshmukh@seagate.com>
Change-Id: I689ba1c4e8c9224cc67badba7fd6cf45e64dd7b6
Seagate-bug-id: MRP-2471
Reviewed-on: http://review.whamcloud.com/14636
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>