Modify block_producer references in other crates where needed for compilation

validator_client/src/block_producer_service/mod.rs

@@ -1,7 +1,7 @@
 mod beacon_block_grpc_client;
 // mod block_producer_service;
 
-use block_producer::{
+use block_proposer::{
     BeaconNode, BlockProducer, DutiesReader, PollOutcome as BlockProducerPollOutcome, Signer,
 };
 use slog::{error, info, warn, Logger};