We can't use a simple sync.Map here because the noInterest map
for inbound gateway connections are used concurrently. Indeed,
whenever an account would have been registered or a new sub created
this could trigger an update of that map in order to clear the
fact that we had sent an A-/RS- and now are sending an A+/RS+.
So changed to simple map but protected by gw connection's lock.
Without this change, server would panic if there are messages
published to cluster A that are sent to server B while a sub
is then created on matching subject on B.
Signed-off-by: Ivan Kozlovic <ivan@synadia.com>
f011db47c7