message: Resolve FIXME about StateProof for plugged txns.
diff: @@ -4,7 +4,7 @@ use errors::pool::PoolError;
  use serde_json;
  use serde_json::Value as SJsonValue;
  use services::ledger::merkletree::merkletree::MerkleTree;
  -use services::pool::types::*;
  +use services::pool::{PoolService, types::*};
  use std::error::Error;
  pub const REQUESTS_FOR_STATE_PROOFS: [&'static str; 7] = [
  @@ -215,7 +215,8 @@ impl Into<Option<RequestEvent>> for PoolEvent {
  error!("Timeout {:?} or nodes {:?} is specified for non-supported request operation type {}",
  timeout, nodes, op);
  None
  - } else if REQUESTS_FOR_STATE_PROOFS.contains(&op.as_str()) /* FIXME check plugged also */ {
  + } else if REQUESTS_FOR_STATE_PROOFS.contains(&op.as_str())
  + || PoolService::get_sp_parser(&op.as_str()).is_some() {
  Some(RequestEvent::CustomSingleRequest(msg, req_id.clone()))
  } else {
  Some(RequestEvent::CustomConsensusRequest(msg, req_id.clone()))
  