message: Clean up one more split connections arg name in tests
  Summary: Something I missed before
diff: @@ -45,13 +45,13 @@ class TestingQuicClientTransport : public QuicClientTransport {
  std::unique_ptr<folly::AsyncUDPSocket> socket,
  std::shared_ptr<ClientHandshakeFactory> handshakeFactory,
  size_t connIdSize = kDefaultConnectionIdSize,
  - bool useSplitConnectionCallbacks = false)
  + bool useConnectionEndWithErrorCallback = false)
  : QuicClientTransport(
  evb,
  std::move(socket),
  std::move(handshakeFactory),
  connIdSize,
  - useSplitConnectionCallbacks) {}
  + useConnectionEndWithErrorCallback) {}
  ~TestingQuicClientTransport() override {
  if (destructionCallback_) {
  