Move plan methods to a trait

src/bin/fullnode.rs

@@ -11,6 +11,7 @@ use pnet::datalink;
 use solana::bank::Bank;
 use solana::crdt::ReplicatedData;
 use solana::entry::Entry;
+use solana::plan::PaymentPlan;
 use solana::server::Server;
 use solana::signature::{KeyPair, KeyPairUtil};
 use solana::transaction::Instruction;