LU-17021 socklnd: fix late ksnr_max_conns set

LU-17021 socklnd: fix late ksnr_max_conns set

ksnr_max_conns was set to the correct value after it was used.

Lustre-change: https://review.whamcloud.com/51890
Lustre-commit: TBD (from cc894288304fb8e6caa44543e6b44b8ec18deb9b)

Test-Parameters: trivial
Signed-off-by: Cyril Bordage <cbordage@whamcloud.com>
Change-Id: I9f2454d915ee1ab27db96f5247028db94965a11f
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/51891
Tested-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>