message: Allow users to produce caf logs for unit tests
diff: @@ -632,12 +632,12 @@ public:
  // -- constructors, destructors, and assignment operators --------------------
  static Config& init_config(Config& cfg) {
  + cfg.set("logger.file-verbosity", caf::atom("quiet"));
  if (auto err = cfg.parse(caf::test::engine::argc(),
  caf::test::engine::argv()))
  CAF_FAIL("failed to parse config: " << to_string(err));
  cfg.set("scheduler.policy", caf::atom("testing"));
  cfg.set("logger.inline-output", true);
  - cfg.set("logger.file-verbosity", caf::atom("quiet"));
  cfg.set("middleman.network-backend", caf::atom("testing"));
  cfg.set("middleman.manual-multiplexing", true);
  cfg.set("middleman.workers", size_t{0});
  