Speedup rotation (#2468)

Speedup leader to validator transitions

fullnode/src/main.rs

@@ -17,6 +17,7 @@ use std::io::{Error, ErrorKind, Result};
 use std::net::{Ipv4Addr, SocketAddr};
 use std::process::exit;
 use std::sync::Arc;
+use std::sync::RwLock;
 use std::thread::sleep;
 use std::time::Duration;
 
@@ -258,7 +259,7 @@ fn main() {
         signer_option,
         cluster_entrypoint,
         no_sigverify,
-        leader_scheduler,
+        Arc::new(RwLock::new(leader_scheduler)),
         Some(rpc_port),
     );