LU-11413 lnet: use right address for routing message

LU-11413 lnet: use right address for routing message

msg_initiator is real sender address, so use this address as
hash source to better distribution against CPT on server side.

Cray-bug-id: LUS-6841
Test-Parameters: trivial
Signed-off-by: Alexey Lyashkov <c17817@cray.com>
Change-Id: Ie4487ea29d9db458564c66518270ad82b5ffae49
Reviewed-on: https://review.whamcloud.com/34032
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>