LU-4017 quota: redefine LL_MAXQUOTAS for Lustre

LU-4017 quota: redefine LL_MAXQUOTAS for Lustre

Lustre code should similarly be patched to use LL_MAXQUOTAS
like EXT4_MAXQUOTAS so that it is independent of the kernel
MAXQUOTAS value.

Signed-off-by: Wang Shilong <wshilong@ddn.com>
Change-Id: I95c894600e6b9fa4932b367a1ef10635a9aa222d
Reviewed-on: http://review.whamcloud.com/19843
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Li Xi <lixi@ddn.com>
Reviewed-by: Niu Yawei <yawei.niu@intel.com>