LU-9810 lnd: use less CQ entries for each connection

LU-9810 lnd: use less CQ entries for each connection

Currently we have a 2 work requests chains per transfer.
It mean OFED stack will generate only 2 events if transfer will
faild. Reduce number CQ entries to avoid extra resource consumption.

Test-Parameters: trivial
Seagate-bug-id: MRP-4508
Signed-off-by: Alexey Lyashkov <alexey.lyashkov@seagate.com>
Change-Id: I0c06fef9589478f40ef7e1eeacff2aec7013e562
Reviewed-on: https://review.whamcloud.com/28279
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Doug Oucharek <dougso@me.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>