Added pending transaction info to eth_getTransactionByHash (#4570)

* Return condition info for pending transactions

* Fixed warnings

util/network/src/discovery.rs

@@ -556,7 +556,6 @@ impl Discovery {
 mod tests {
 	use super::*;
 	use std::net::{SocketAddr};
-	use util::sha3::Hashable;
 	use util::FixedHash;
 	use node_table::{Node, NodeId, NodeEndpoint};