core: update PoolPassiveIoFileMessage to provide boot verifier

update nfs code to detect pool reboots based on verifier if available.

Acked-by: Paul Millar
Target: master
Require-book: no
Require-notes: no
nfs: do not label pnfsid and client ip in NDC

Acked-by: Paul Millar
Target: master
Require-book: no
Require-notes: no