Tests: simplified QUIC tests for discarding 0-RTT keys.

Testing for regressions in discarding 0-RTT keys is now separated
from 1-RTT stream tests.  Completing a QUIC handshake in tests
includes sending some 1-RTT data in control and encoder streams.
This is enough to trigger the bug fixed in 930caed3b (1.27.4).

Also, this improves test stability due to a pending bug in HTTP3.pm,
which causes certain QUIC frames to be not reported when received
together with stream frames in a single packet.

Author: pluknet

h3_ssl_early_data.t

@@ -101,19 +101,23 @@ is($frame->{headers}->{'x-early'}, '1', 'reused session is early');
 
 }
 
-$s->send_chain();
+# includes sending some initial 1-RTT data
 
-$frames = $s->read(all => [{ sid => $s->new_stream(), fin => 1 }]);
+$s->send_chain();
 
 TODO: {
 local $TODO = 'not yet'
 	if $t->has_version('1.27.1') && !$t->has_version('1.27.4');
 
+$frames = $s->read(all => [{ type => 'HANDSHAKE_DONE' }], wait => 0.5);
+
 ($frame) = grep { $_->{type} eq "HANDSHAKE_DONE" } @$frames;
 ok($frame, '1rtt after discarding 0rtt');
 
 }
 
+$frames = $s->read(all => [{ sid => $s->new_stream(), fin => 1 }]);
+
 ($frame) = grep { $_->{type} eq "HEADERS" } @$frames;
 is($frame->{headers}->{'x-session'}, 'r', 'reused session 1rtt');
 is($frame->{headers}->{'x-early'}, undef, 'reused session not early');