gwmaker: add field `chainType` to RawGw; strip prefix `rskd` from field names.
gwmaker: add field `chainType` to RawGw; strip prefix `rskd` from field names.

btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool,btccom/btcpool