refactor: rename AbstractLayoutView to SampleView

Author: mlopezFC

src/test/java/com/flowingcode/addons/applayout/AbstractLayoutView.java renamed to src/test/java/com/flowingcode/addons/applayout/SampleView.java

@@ -24,9 +24,9 @@
 import com.vaadin.flow.router.Route;
 import org.junit.Ignore;
 
-@Route(value = "view", layout = AbstractLayoutDemo.class)
-@Ignore
-public class AbstractLayoutView extends Div {
+@SuppressWarnings("serial")
+@Route(value = "view", layout = CustomAppLayout.class)
+public class SampleView extends Div {
 
   {
     add(new Span("Hello world"));