Disable Image IO tests for now

We will bring them back when upgrading to GraalVM 21 but for now they
don't work with GraalVM 20.3.

integration-tests/main/src/main/java/io/quarkus/it/corestuff/ImageIOSupport.java

@@ -1,9 +1,7 @@
 package io.quarkus.it.corestuff;
 
-import java.awt.image.BufferedImage;
 import java.io.IOException;
 
-import javax.imageio.ImageIO;
 import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
@@ -14,9 +12,10 @@ public class ImageIOSupport extends HttpServlet {
 
     @Override
     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
-        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
-        BufferedImage image = ImageIO.read(classLoader.getResource("META-INF/resources/1px.png"));
-        resp.getWriter().write(image.getHeight() + "x" + image.getWidth());
+        // Please uncomment this when we upgrade from GraalVM 20.3 to GraalVM 21
+        //        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+        //        BufferedImage image = ImageIO.read(classLoader.getResource("META-INF/resources/1px.png"));
+        //        resp.getWriter().write(image.getHeight() + "x" + image.getWidth());
     }
 
 }

integration-tests/main/src/test/java/io/quarkus/it/main/ImageIOTestCase.java

@@ -3,6 +3,7 @@
 import static io.restassured.RestAssured.when;
 import static org.hamcrest.Matchers.equalTo;
 
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 import io.quarkus.test.junit.QuarkusTest;
@@ -11,6 +12,7 @@
 public class ImageIOTestCase {
 
     @Test
+    @Disabled("Please bring this back when we upgrade from GraalVM 20.3 to GraalVM 21")
     public void testImageRead() {
         when().get("/core/imageio").then().body(equalTo("1x1"));
     }