p2p: update dialog_token on failures as well

Update the dialog token even when GO negotiation
failed, in order prevent the same dialog token
from being used again.

Change-Id: I4fc0227a0765631da83ac6c48c90a913fdae55a1
Signed-off-by: Eliad Peller <eliad@wizery.com>
Revert "P2P: ignore neg_req with previously used dialog_token"

This reverts commit 7075e6132f2c28c4f88e81f569f8d66d91f5c3d7.

Some devices use the same dialog token when connecting
back (after go negotiation failure), which result in
another failure.
simply revert this (internal) patch in order to overcome it.

Change-Id: Id67e1f23173b0cd96c58e2905d887356ad579593
Signed-off-by: Eliad Peller <eliad@wizery.com>