LU-13035 lnet: fix remote peer ni selection

LU-13035 lnet: fix remote peer ni selection

When selecting the NI of a remote peer we can only round robin
over the NIs. Remote peer NIs have no credits and no health.
However, we'd like to still spread the traffic over the remote
peer NIs as much as we can.

Remote peer NIs sequence number was not being incremented and
therefore the round robin algorithm wasn't working.

Test-parameters: trivial

Signed-off-by: Amir Shehata <ashehata@whamcloud.com>
Change-Id: I83dba3597987844b7bddc980c53e8c6d90bcd3b2
Reviewed-on: https://review.whamcloud.com/36915
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Tested-by: Maloo <maloo@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>