lnwallet+funding: include node net address in reservation workflow

This commit modifies the existing channel reservation workflow slightly
to thread through the IP address that we were able to reach the node
at, or the one which the node reached us via. Additionally, rather than
using OpenChannel.FullSync() at the end of the reservation workflow, we
now use OpenChannel.FullSyncWithAddr() in order to create the
relationship in the database between the channel, and the p2p node we
created the channel with.

All tests, as well as a portion of the fundingManager have been updated
accordingly,

lnwallet/reservation.go

@@ -1,6 +1,7 @@
 package lnwallet
 
 import (
+	"net"
 	"sync"
 
 	"github.com/lightningnetwork/lnd/channeldb"
@@ -114,6 +115,7 @@ type ChannelReservation struct {
 	theirContribution *ChannelContribution
 
 	partialState *channeldb.OpenChannel
+	nodeAddr     *net.TCPAddr
 
 	// The ID of this reservation, used to uniquely track the reservation
 	// throughout its lifetime.