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

snap/hooks/configure

@@ -16,8 +16,8 @@ num_tokens="$(snapctl get num-tokens)"
 case $mode in
 leader+drone)
   $SNAP/bin/setup.sh ${num_tokens:+-n $num_tokens} ${ip_address_arg} -t leader
-  snapctl start --enable solana.daemon-leader
   snapctl start --enable solana.daemon-drone
+  snapctl start --enable solana.daemon-leader
   ;;
 leader)
   $SNAP/bin/setup.sh ${num_tokens:+-n $num_tokens} ${ip_address_arg} -t leader