LU-8844 llite: delete lloop

LU-8844 llite: delete lloop

Since the migration to clio the lloop performance
has been far worst than the default loop back
device. Also lloop never worked on non x86 platforms.
Also newer kernel's loop back devices support
direct IO so their is no need for lloop anymore.

Change-Id: Iab029d4fcb223b01f07a1f279e2d4da8616fa93e
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/23817
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>