Submit leader's vote after observing 2/3 validator votes (#780)

* fixup!

* fixups!

* send the vote and count it

* actually vote

* test

* Spelling fixes

* Process the voting transaction in the leader's bank

* Send tokens to the leader

* Give leader tokens in more cases

* Test for write_stage::leader_vote

* Request airdrop inside fullnode and not the script

* Change readme to indicate that drone should be up before leader

And start drone before leader in snap scripts

* Rename _kp => _keypair for keypairs and other review fixups

* Remove empty else
* tweak test_leader_vote numbers to be closer to testing 2/3 boundary
* combine creating blob and transaction for leader/validator

src/client.rs

@@ -0,0 +1,20 @@
+use crdt::NodeInfo;
+use nat::udp_random_bind;
+use std::time::Duration;
+use thin_client::ThinClient;
+
+pub fn mk_client(r: &NodeInfo) -> ThinClient {
+    let requests_socket = udp_random_bind(8000, 10000, 5).unwrap();
+    let transactions_socket = udp_random_bind(8000, 10000, 5).unwrap();
+
+    requests_socket
+        .set_read_timeout(Some(Duration::new(1, 0)))
+        .unwrap();
+
+    ThinClient::new(
+        r.contact_info.rpu,
+        requests_socket,
+        r.contact_info.tpu,
+        transactions_socket,
+    )
+}