LSP onionessage send to offline client will fail

[TheBlueMatt]

Imagine an LSP with a mobile client. The LSP wants to pay an offer that client issued. It generates an onion messages invreq and sends it. The OnionMessenger notices it's not connected and searches the network graph. It doesn't find the mobile client so doesn't create a direct connect event. The message gets dropped and the payment fails.

We should probably just generate the DC event irrespective of the network graph so the LSP can use LSPS5 to wake the client.