message: Adjust test client to recent changes in monorepo
diff: #include <realm/util/network.hpp>
  #include <realm/util/network_ssl.hpp>
  #include <realm/util/websocket.hpp>
  +#include <realm/list.hpp>
  #include <realm/sync/protocol.hpp>
  #include <realm/sync/history.hpp>
  #include <realm/sync/changeset_cooker.hpp>
  @@ -718,7 +719,7 @@ void Peer::receive(VersionID)
  ColKey col_timestamp = table->get_column_key("timestamp");
  const std::set<ObjKey>& objects = table_entry.second;
  for (ObjKey obj_key : objects) {
  - ConstObj obj = table->get_object(obj_key);
  + Obj obj = table->get_object(obj_key);
  std::int_fast64_t originator_ident = obj.get<int64_t>(col_originator);
  if (originator_ident != m_originator_ident)
  continue;
  