message: test: deflaking filter manager integration test
  Risk Level: n/a (test only)
  Testing: passes
  Docs Changes: n/a
  Fixes
diff: @@ -468,12 +468,12 @@ TEST_P(InjectDataWithEchoFilterIntegrationTest, FilterChainMismatch) {
  initialize();
  auto tcp_client = makeTcpConnection(lookupPort("listener_0"));
  - ASSERT_TRUE(tcp_client->write("hello"));
  + ASSERT_TRUE(tcp_client->write("hello", false));
  std::string access_log =
  absl::StrCat("NR ", StreamInfo::ResponseCodeDetails::get().FilterChainNotFound);
  EXPECT_THAT(waitForAccessLog(listener_access_log_name_), testing::HasSubstr(access_log));
  - tcp_client->close();
  + tcp_client->waitForDisconnect();
  }
  /**
  