LU-17034 quota: tmp fix against memory corruption

LU-17034 quota: tmp fix against memory corruption

Change QMT_INIT_SLV_CNT from 64 to 2000 to avoid accessing
memory out of array lqeg_arr. It could happen when at least
one of OSTs has index larger than the whole number of OSTs.
It is a temporary solution and maximum supported OST index
is 0x7d0. Later it will be changed with the longterm
solution.

Signed-off-by: Sergey Cheremencev <scherementsev@ddn.com>
Change-Id: Ic892352b7e833c58ea14bb7cfb98b4946f4ca9bb
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/52180
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>