message: Fix unit test checks
diff: @@ -33,7 +33,6 @@ using dummy_actor = stateful_actor<dummy_state>;
  struct fixture : test_coordinator_fixture<> {
  actor dummy;
  - actor aut;
  fixture() {
  dummy = sys.spawn<dummy_actor>();
  @@ -56,6 +55,7 @@ SCENARIO("response handles are convertible to observables and singles") {
  .as_single<int32_t>()
  .subscribe([&result](int32_t val) { result = val; },
  [&result](const error& what) { result = what; });
  + auto aut = actor{self};
  launch();
  expect((int32_t), from(aut).to(dummy).with(42));
  expect((int32_t), from(dummy).to(aut).with(84));
  @@ -79,6 +79,7 @@ SCENARIO("response handles are convertible to observables and singles") {
  },
  [&](const error& what) { result = what; },
  [&] { completed = true; });
  + auto aut = actor{self};
  launch();
  expect((int32_t), from(aut).to(dummy).with(42));
  expect((int32_t), from(dummy).to(aut).with(84));
  @@ -99,6 +100,7 @@ SCENARIO("response handles are convertible to observables and singles") {
  .as_single<int32_t>()
  .subscribe([&result](int32_t val) { result = val; },
  [&result](const error& what) { result = what; });
  + auto aut = actor{self};
  launch();
  expect((int32_t), from(aut).to(dummy).with(13));
  expect((error), from(dummy).to(aut));
  @@ -122,6 +124,7 @@ SCENARIO("response handles are convertible to observables and singles") {
  },
  [&](const error& what) { result = what; },
  [&] { completed = true; });
  + auto aut = actor{self};
  launch();
  expect((int32_t), from(aut).to(dummy).with(13));
  expect((error), from(dummy).to(aut));
  