LU-11413 lnet: use right rtr address

LU-11413 lnet: use right rtr address

use a sender router to avoid credits distribution problem.
Sender is preferable rtr now.

Cray-bug-id: LUS-6490
Test-Parameters: trivial
Signed-off-by: Alexey Lyashkov <c17817@cray.com>
Change-Id: Ic7cf57820176979a52675dcc74342c2e26335e73
Reviewed-on: https://review.whamcloud.com/34031
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Chris Horn <hornc@cray.com>
Reviewed-by: Olaf Weber <olaf.weber@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>