message: Switch to actor_proxy_impl in integration test
diff: #include "caf/byte.hpp"
  #include "caf/forwarding_actor_proxy.hpp"
  +#include "caf/net/actor_proxy_impl.hpp"
  #include "caf/net/basp/connection_state.hpp"
  #include "caf/net/basp/constants.hpp"
  #include "caf/net/basp/ec.hpp"
  @@ -144,10 +145,10 @@ struct fixture : test_coordinator_fixture<>,
  }
  strong_actor_ptr make_proxy(node_id nid, actor_id aid) override {
  - using impl_type = forwarding_actor_proxy;
  + using impl_type = actor_proxy_impl;
  using hdl_type = strong_actor_ptr;
  actor_config cfg;
  - return make_actor<impl_type, hdl_type>(aid, nid, &sys, cfg, self);
  + return make_actor<impl_type, hdl_type>(aid, nid, &sys, cfg, mgr);
  }
  void set_last_hop(node_id*) override {
  