LU-10391 lnet: change src_nid arg to lnet_parse() to 16byte

LU-10391 lnet: change src_nid arg to lnet_parse() to 16byte

lnet_parse() now gets the source nid as 'struct lnet_nid *'.

Test-Parameters: trivial
Test-Parameters: serverversion=2.12 serverdistro=el7.9 testlist=runtests
Test-Parameters: clientversion=2.12 testlist=runtests
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I7afac71c97e4564e544695f057fd0b002d97afc9
Reviewed-on: https://review.whamcloud.com/43614
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>