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-
This changes the default behavior, individual tests can overwrite this option.
As a result, it is possible to run the entire test suite with
--v2transport, and all connections to the python p2p will then use it.
Also adjust several tests that are already running with --v2transport in the
test runner (although they actually made v1 connection before this change).
This is done in the same commit so that there isn't an
intermediate commit in which the CI fails.
