Use rooted bank by default in rpc bank selection (#6759)

* Name anonymous parameters for clarity

* Add CommitmentConfig to select bank for rpc

* Add commitment information to jsonrpc docs

* Update send_and_confirm retries as per commitment defaults

* Pass CommitmentConfig into client requests; also various 'use' cleanup

* Use _with_commitment methods to speed local_cluster tests

* Pass CommitmentConfig into Archiver in order to enable quick confirmations in local_cluster tests

* Restore solana ping speed

* Increase wallet-sanity timeout to account for longer confirmation time

cli/src/validator_info.rs

@@ -11,11 +11,14 @@ use serde_derive::{Deserialize, Serialize};
 use serde_json::{Map, Value};
 use solana_client::rpc_client::RpcClient;
 use solana_config_api::{config_instruction, get_config_data, ConfigKeys, ConfigState};
-use solana_sdk::account::Account;
-use solana_sdk::message::Message;
-use solana_sdk::pubkey::Pubkey;
-use solana_sdk::signature::{Keypair, KeypairUtil};
-use solana_sdk::transaction::Transaction;
+use solana_sdk::{
+    account::Account,
+    commitment_config::CommitmentConfig,
+    message::Message,
+    pubkey::Pubkey,
+    signature::{Keypair, KeypairUtil},
+    transaction::Transaction,
+};
 use std::error;
 
 pub const MAX_SHORT_FIELD_LENGTH: usize = 70;
@@ -297,7 +300,9 @@ pub fn process_set_validator_info(
     };
 
     // Check existence of validator-info account
-    let balance = rpc_client.poll_get_balance(&info_pubkey).unwrap_or(0);
+    let balance = rpc_client
+        .poll_get_balance_with_commitment(&info_pubkey, CommitmentConfig::default())
+        .unwrap_or(0);
 
     let keys = vec![(id(), false), (config.keypair.pubkey(), true)];
     let (message, signers): (Message, Vec<&Keypair>) = if balance == 0 {