LU-19115 socklnd: fix ksocknal tunables setup

LU-19115 socklnd: fix ksocknal tunables setup

ksocknal tunables should be setup after default ni interface is
initialized, otherwise NIC speed to connection count conversion
will be skipped.

Signed-off-by: Di Wang <ddiwang@google.com>
Change-Id: I4726773ae99e79a3bb1a4871992c12966fc48075
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/59833
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>