glusterd: Fix misleading log messages of the kind "Node <n> responded to <n>"

PROBLEM:

glusterd logs coming from glusterd_xfer_friend_add_resp() (wrongly)
indicate that a node responded to itself, although it actually
responded to one of its peers.

FIX:

Make glusterd_xfer_friend_add_resp() distinguish between remote host
and self and print the appropriate hostname.

Change-Id: I2a504eeb058c08a0d378443888eb6f1dc7edc76f
BUG: 963537
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/5017
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>