LU-10391 lnet: use large nids in struct lnet_event

LU-10391 lnet: use large nids in struct lnet_event

All nids, including those in process_id, are changed to
to struct lnet_nid / struct lnet_processid.

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: I799dbbc22f7cfe403f07eb22f4bfc4e4b5dc23ea
Reviewed-on: https://review.whamcloud.com/43600
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>