Merge branch '6-testsubengine-does-not-respond' into 'dev'

Resolve "TestSubengine does not respond"

See merge request Steins7/iv!10

src/controller.rs

@@ -89,7 +89,7 @@ where
                         subengine.exec(SubengineCommand::Run);
                     }
                     for subengine in subengines {
-                        subengine.wait_for_exec(Duration::from_millis(1)).unwrap();
+                        subengine.wait_for_exec(Duration::from_millis(10)).unwrap();
                     }
                 }