test: also move rpc definition of RpcRequest and RpcResponse for scumbag server test
test: also move rpc definition of RpcRequest and RpcResponse for scumbag server test

eris-ltd/eris-db,silasdavis/burrow,silasdavis/burrow,benjaminbollen/eris-db,benjaminbollen/eris-db,eris-ltd/eris-db,silasdavis/burrow,benjaminbollen/burrow,benjaminbollen/burrow