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_leak.py

@@ -84,8 +84,8 @@ class NoVerackIdlePeer(LazyPeer):
     # list!
     def on_version(self, message):
         self.version_received = True
-        self.send_message(msg_ping())
-        self.send_message(msg_getaddr())
+        self.send_without_ping(msg_ping())
+        self.send_without_ping(msg_getaddr())
 
 
 class P2PVersionStore(P2PInterface):
@@ -121,7 +121,7 @@ class P2PLeakTest(BitcoinTestFramework):
         # Pre-wtxidRelay peer that sends a version but not a verack and does not support feature negotiation
         # messages which start at nVersion == 70016
         pre_wtxidrelay_peer = self.nodes[0].add_p2p_connection(NoVerackIdlePeer(), send_version=False, wait_for_verack=False)
-        pre_wtxidrelay_peer.send_message(self.create_old_version(70015))
+        pre_wtxidrelay_peer.send_without_ping(self.create_old_version(70015))
 
         # Wait until the peer gets the verack in response to the version. Though, don't wait for the node to receive the
         # verack, since the peer never sent one
@@ -173,7 +173,7 @@ class P2PLeakTest(BitcoinTestFramework):
         self.log.info('Check that old peers are disconnected')
         p2p_old_peer = self.nodes[0].add_p2p_connection(P2PInterface(), send_version=False, wait_for_verack=False)
         with self.nodes[0].assert_debug_log(["using obsolete version 31799, disconnecting peer=5"]):
-            p2p_old_peer.send_message(self.create_old_version(31799))
+            p2p_old_peer.send_without_ping(self.create_old_version(31799))
             p2p_old_peer.wait_for_disconnect()