LU-9120 lnet: reset health value

LU-9120 lnet: reset health value

Added an IOCTL to set the local or peer ni health value.
This would be useful in debugging where we can test the selection
algorithm and recovery mechanism by reducing the health of an
interface.

If the value specified is -1 then reset the health value to maximum.
This is useful to reset the system once a network issue has been
resolved. There would be no need to wait for the interface to go to
fully healthy on its own. It might be desirable to shortcut the
process.

Test-Parameters: forbuildonly
Signed-off-by: Amir Shehata <ashehata@whamcloud.com>
Change-Id: I45a5844bbaa72f769e37a39526773ef4c71118c0
Reviewed-on: https://review.whamcloud.com/32773
Tested-by: Jenkins
Reviewed-by: Olaf Weber <olaf.weber@hpe.com>
Reviewed-by: Sonia Sharma <sharmaso@whamcloud.com>