message: integration_tests: fail if no system found
  We should abort a test if we don't find a system.
diff: @@ -23,7 +23,7 @@ TEST_F(SitlTest, ActionHoverAsync)
  prom.set_value();
  UNUSED(uuid);
  });
  - EXPECT_EQ(fut.wait_for(std::chrono::seconds(2)), std::future_status::ready);
  + ASSERT_EQ(fut.wait_for(std::chrono::seconds(2)), std::future_status::ready);
  }
  System &system = dc.system();
  