message: Use CAF_RAISE instead of throw in test_multiplexer
diff: @@ -333,11 +333,11 @@ void test_multiplexer::prepare_connection(accept_handle src,
  CAF_LOG_DEBUG("insert scribe data for" << CAF_ARG(hdl));
  auto res1 = scribe_data_.emplace(hdl, scribe_data{input, output});
  if (!res1.second)
  - throw std::runtime_error("prepare_connection: handle already in use");
  + CAF_RAISE_ERROR("prepare_connection: handle already in use");
  CAF_LOG_DEBUG("insert scribe data on peer for" << CAF_ARG(peer_hdl));
  auto res2 = peer.scribe_data_.emplace(peer_hdl, scribe_data{output, input});
  if (!res2.second)
  - throw std::runtime_error("prepare_connection: peer handle already in use");
  + CAF_RAISE_ERROR("prepare_connection: peer handle already in use");
  provide_acceptor(port, src);
  add_pending_connect(src, hdl);
  peer.provide_scribe(std::move(host), port, peer_hdl);
  