LU-2686 kernel: sock_map_fd() replaced by sock_alloc_file()

LU-2686 kernel: sock_map_fd() replaced by sock_alloc_file()

Use sock_alloc_file() replace sock_map_fd()

Signed-off-by: yang sheng <yang.sheng@intel.com>
Change-Id: I04cbcd651689af6b82b48ba5d49ddbf99a6758bf
Reviewed-on: http://review.whamcloud.com/5973
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Peng Tao <bergwolf@gmail.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Alexey Shvetsov <alexxy@gentoo.org>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>