Support settable drone lamport cap (#3675)

drone/src/drone.rs

@@ -243,10 +243,18 @@ pub fn request_airdrop_transaction(
 }
 
 // For integration tests. Listens on random open port and reports port to Sender.
-pub fn run_local_drone(mint_keypair: Keypair, sender: Sender<SocketAddr>) {
+pub fn run_local_drone(
+    mint_keypair: Keypair,
+    sender: Sender<SocketAddr>,
+    request_cap_input: Option<u64>,
+) {
     thread::spawn(move || {
         let drone_addr = socketaddr!(0, 0);
-        let drone = Arc::new(Mutex::new(Drone::new(mint_keypair, None, None)));
+        let drone = Arc::new(Mutex::new(Drone::new(
+            mint_keypair,
+            None,
+            request_cap_input,
+        )));
         let socket = TcpListener::bind(&drone_addr).unwrap();
         sender.send(socket.local_addr().unwrap()).unwrap();
         info!("Drone started. Listening on: {}", drone_addr);

drone/tests/local-drone.rs

@@ -19,7 +19,7 @@ fn test_local_drone() {
     let expected_tx = Transaction::new(&[&keypair], message, blockhash);
 
     let (sender, receiver) = channel();
-    run_local_drone(keypair, sender);
+    run_local_drone(keypair, sender, None);
     let drone_addr = receiver.recv().unwrap();
 
     let result = request_airdrop_transaction(&drone_addr, &to, lamports, blockhash);