LU-9078 lnet: Fix route hops print

LU-9078 lnet: Fix route hops print

The default number of hops for  a route is -1. This is
currently being printed as %u. Change that to %d to
make it print out properly.

Test-Parameters: trivial
Signed-off-by: Amir Shehata <amir.shehata@intel.com>
Change-Id: I13c416b1ff86b55d72ffa124441dc358c9cea97b
Reviewed-on: https://review.whamcloud.com/25250
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Olaf Weber <olaf@sgi.com>
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>