Wake up replay stage when the poh bank is cleared. (#3211)

* wake up replay stage when the poh bank is cleared

* bump ticks per second

* Increase ticks per slot to match faster tick rate

* Remove check that working bank must be the bank for the greatest slot

* Make start_leader() skip starting TPU for slots we've already been leader for

core/src/fullnode.rs

@@ -110,6 +110,13 @@ impl Fullnode {
             PohRecorder::new(bank.tick_height(), bank.last_blockhash());
         let poh_recorder = Arc::new(Mutex::new(poh_recorder));
         let poh_service = PohService::new(poh_recorder.clone(), &config.tick_config, &exit);
+        poh_recorder.lock().unwrap().clear_bank_signal =
+            blocktree.new_blobs_signals.first().cloned();
+        assert_eq!(
+            blocktree.new_blobs_signals.len(),
+            1,
+            "New blob signal for the TVU should be the same as the clear bank signal."
+        );
 
         info!("node info: {:?}", node.info);
         info!("node entrypoint_info: {:?}", entrypoint_info_option);