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_addrfetch.py

@@ -62,7 +62,7 @@ class P2PAddrFetch(BitcoinTestFramework):
 
         self.log.info("Check that answering with larger addr messages leads to disconnect")
         msg.addrs = [ADDR] * 2
-        peer.send_message(msg)
+        peer.send_without_ping(msg)
         peer.wait_for_disconnect(timeout=5)
 
         self.log.info("Check timeout for addr-fetch peer that does not send addrs")