Rename button ID for clarity and update test locator accordingly

Author: fredpena

src/main/java/org/javadominicano/views/BasicView.java

@@ -21,7 +21,7 @@ public BasicView() {
         paragraph.setId("msg");
 
         Button button = new Button("Click me");
-        button.setId("btn");
+        button.setId("btnClick");
         button.addClickListener(event -> {
             paragraph.setText("Clicked!");
         });

src/test/java/org/javadominicano/BasicViewTest.java

@@ -24,8 +24,8 @@ void display_basic_view() {
 
         assertThat(page.getByText("Click me")).isVisible();
 
-//        page.locator("vaadin-button").getByText("Click me").click();
-        page.locator("#btn").click();
+        page.locator("vaadin-button").getByText("Click me").click();
+//        page.locator("#btn").click();
 
         assertThat(page.locator("#msg")).containsText("Clicked!");