require to account signature (#6658)

* require to signature

* fixing invocation to create_account

* fix create_account references

* address review comment

* whacking bugs in tests

* fixing stake program tests

core/src/rpc_pubsub.rs

@@ -402,7 +402,11 @@ mod tests {
             None,
             51,
         );
-        let tx = Transaction::new_signed_instructions(&[&contract_funds], ixs, blockhash);
+        let tx = Transaction::new_signed_instructions(
+            &[&contract_funds, &contract_state],
+            ixs,
+            blockhash,
+        );
         process_transaction_and_notify(&bank_forks, &tx, &rpc.subscriptions).unwrap();
         sleep(Duration::from_millis(200));
 

core/src/rpc_subscriptions.rs

@@ -316,7 +316,7 @@ mod tests {
         let alice = Keypair::new();
         let tx = system_transaction::create_account(
             &mint_keypair,
-            &alice.pubkey(),
+            &alice,
             blockhash,
             1,
             16,
@@ -371,7 +371,7 @@ mod tests {
         let alice = Keypair::new();
         let tx = system_transaction::create_account(
             &mint_keypair,
-            &alice.pubkey(),
+            &alice,
             blockhash,
             1,
             16,