Bug - introduce btc/usd

[Desrever Nu]

19:32:14.642 [qtp9089174-137 - //:6667/previeworderbook] ERROR - java.io.IOException: Server returned HTTP response code: 400 for URL: https://api.bitfinex.com/v1/pubticker/nbtusd [c.n.n.p.f.BitfinexPriceFeed:54] 19:32:14.646 [qtp9089174-137 - //:6667/previeworderbook] ERROR - Unable to forceFetchLastPrice com.nubits.nubot.pricefeeds.FeedCallException: BitfinexPriceFeed : Unable to fetch last price. [c.n.n.p.f.AbstractPriceFeed:56]