scripted-diff: test: Rename send_message to send_without_ping

send_message only drops the bytes in a buffer and a sync is needed to
avoid intermittent test issues. Change the name of the method to make
this more apparent during review.

-BEGIN VERIFY SCRIPT-
 sed -i 's/send_message(/send_without_ping(/g' $( git grep -l 'send_message(' )
-END VERIFY SCRIPT-

test/functional/p2p_orphan_handling.py

@@ -312,7 +312,7 @@ class OrphanHandlingTest(BitcoinTestFramework):
         # Even though the peer would send a notfound for the "old" confirmed transaction, the node
         # doesn't give up on the orphan. Once all of the missing parents are received, it should be
         # submitted to mempool.
-        peer.send_message(msg_notfound(vec=[CInv(MSG_WITNESS_TX, int(txid_conf_old, 16))]))
+        peer.send_without_ping(msg_notfound(vec=[CInv(MSG_WITNESS_TX, int(txid_conf_old, 16))]))
         # Sync with ping to ensure orphans are reconsidered
         peer.send_and_ping(msg_tx(missing_tx["tx"]))
         assert_equal(node.getmempoolentry(orphan["txid"])["ancestorcount"], 3)
@@ -611,7 +611,7 @@ class OrphanHandlingTest(BitcoinTestFramework):
             tx_child_1 = self.wallet.create_self_transfer(utxo_to_spend=tx_parent_1["new_utxo"])
             parent_orphans.append(tx_parent_1["tx"])
             orphans.append(tx_child_1["tx"])
-            peer_1.send_message(msg_tx(tx_child_1["tx"]))
+            peer_1.send_without_ping(msg_tx(tx_child_1["tx"]))
 
         peer_1.sync_with_ping()
         orphanage = node.getorphantxs()