During the integration tests we might want to shut down a trader client
through the admin RPC. If that closes the shutdown channel on a package
global interceptor, that means we can't start another trader client
during that test. We need to make sure we can pass in an interceptor for
each trader instance.
We update to the latest lnd version that contains the new flag in
AbandonChannel that we need. Because master is now tagged with
v0.x.99-beta, we can already increase the required version in the
server.
Because we touch this file anyway, let's as well avoid a bug in
lndclient that requires a subserver macaroon to be present even if we
don't need that subserver's functionality.
