[j-nsp] WAN input prioritization on MX

[Saku Ytti]

> Too bad this config does not actually commit, so you're left with unreachable
> empty config MX80 upon upgrade, but difference to normal JunOS operation goes
> to the margin of error.
> Commit error is 'Slot 1 cannot support Ingress Queueing in more than one pic'

This is my bad, they were there before upgrade (running in 11.4R5.5) for
fpc1, pic[0123], verified from config backups. So pilot error, not upgrade
error (granted 'no-validate' was not used, so it should have complained,
but still pilot error in my book)

-- 
  ++ytti