Add a constructor to generate random pubkeys

core/tests/rpc.rs

@@ -6,7 +6,7 @@ use serde_json::{json, Value};
 use solana::fullnode::new_fullnode_for_tests;
 use solana_client::rpc_client::get_rpc_request_str;
 use solana_sdk::hash::Hash;
-use solana_sdk::signature::{Keypair, KeypairUtil};
+use solana_sdk::pubkey::Pubkey;
 use solana_sdk::system_transaction::SystemTransaction;
 use std::fs::remove_dir_all;
 use std::thread::sleep;
@@ -17,7 +17,7 @@ fn test_rpc_send_tx() {
     solana_logger::setup();
 
     let (server, leader_data, alice, ledger_path) = new_fullnode_for_tests();
-    let bob_pubkey = Keypair::new().pubkey();
+    let bob_pubkey = Pubkey::new_rand();
 
     let client = reqwest::Client::new();
     let request = json!({