CompactblockProcessor react to code 14 generally

[HonzaR]

Is your feature request related to a problem? Please describe.

We'd like to check the lightwalletd calls results for status code 14 generally for all calls.

Describe the solution you'd like

Let's check and add some single point function that we use to check all lightwalletd results from CompactBlockProcessor to ensure we set the State.Disconnected properly for every such result.

if (response is Response.Failure.Server.Unavailable) {
   Twig.error { "Download UTXOs failed - setting Disconnected state" }
   setState(State.Disconnected)
}

Alternatives you've considered

Additional context