Tracking evolution of the ApplicationValidatorTest with the refactoring

- Issue: I tried to use mocking, but I have found that it doesn't work well and
  even if, it would not cover too much of the implementation.
- dol and ejb-container have too many relations, in fact the abstraction was
  unusable and worthless (and even undocumented).
  - I can create mocks for interfaces but I can't use them for validator.
  - I can create half-initialized mock of the abstract class, but it throws
    exceptions which take too much time to investigate and finally I find
    that the issue is the mock, not the code I wanted to test.
  - Same would apply for custom implementations (like is the only one,
    ejb-container) - too much details matter.
- In practice: dol should have much better API, OR all descriptors and nodes
  whould move to DOL. They can be extended and used in ejb-container, but must
  have some basic consistent meaningful implementation.
- So I do some basic steps forward now.
- Final result: test covering bug we have noticed in logs + the fix
  not breaking anything else. Side effect result: easier future changes.

Signed-off-by: David Matějček <david.matejcek@omnifish.ee>

appserver/deployment/dol/pom.xml

@@ -153,6 +153,12 @@
             <version>${project.version}</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.glassfish.main</groupId>
+            <artifactId>test-utils</artifactId>
+            <version>${project.version}</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter-engine</artifactId>

appserver/deployment/dol/src/test/java/com/sun/enterprise/deployment/test/DolJunit5Extension.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2023 Eclipse Foundation and/or its affiliates. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0, which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the
+ * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
+ * version 2 with the GNU Classpath Exception, which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ */
+
+package com.sun.enterprise.deployment.test;
+
+import org.glassfish.tests.utils.junit.HK2JUnit5Extension;
+import org.junit.jupiter.api.extension.ExtensionContext;
+
+/**
+ * @author David Matejcek
+ */
+public class DolJunit5Extension extends HK2JUnit5Extension {
+
+    @Override
+    public void postProcessTestInstance(final Object testInstance, ExtensionContext context) throws Exception {
+        super.postProcessTestInstance(testInstance, context);
+    }
+}