chore: Add junit ignore deps for dependency plugin

Author: lqiu96

google-cloud-logging/pom.xml

@@ -108,6 +108,13 @@
     </dependency>
 
     <!-- Test dependencies -->
+    <!-- JUnit 4.x is still needed as the gapic-generator still generates tests with it -->
+    <!-- Remove once the gapic-generator is able to generate JUnit 5.x tests -->
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter-api</artifactId>
@@ -123,6 +130,8 @@
       <artifactId>junit-jupiter-params</artifactId>
       <scope>test</scope>
     </dependency>
+    <!-- The generated tests from gapic-generator are still generated with JUnit4. -->
+    <!-- Remove once they are migrated to JUnit 5.x+ -->
     <dependency>
       <groupId>org.junit.vintage</groupId>
       <artifactId>junit-vintage-engine</artifactId>

google-cloud-logging/src/test/java/com/google/cloud/logging/InstrumentationTest.java

@@ -149,4 +149,4 @@ private static void verifyEntries(
     assertEquals(0, names.size());
     assertEquals(0, versions.size());
   }
-}
+}

pom.xml

@@ -102,11 +102,10 @@
       </dependency>
 
       <dependency>
-        <groupId>org.junit</groupId>
-        <artifactId>junit-bom</artifactId>
-        <version>5.10.1</version>
-        <type>pom</type>
-        <scope>import</scope>
+        <groupId>junit</groupId>
+        <artifactId>junit</artifactId>
+        <version>4.13.2</version>
+        <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>org.easymock</groupId>
@@ -195,7 +194,13 @@
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-dependency-plugin</artifactId>
           <configuration>
-            <ignoredUnusedDeclaredDependencies>org.objenesis:objenesis</ignoredUnusedDeclaredDependencies>
+            <ignoredUnusedDeclaredDependencies>
+              <ignoredUnusedDeclaredDependency>org.objenesis:objenesis</ignoredUnusedDeclaredDependency>
+              <!-- maven-dependency-plugin cannot detect the runtime usage of junit-jupiter-engine for executing JUnit 5+ tests. -->
+              <ignoredUnusedDeclaredDependency>org.junit.jupiter:junit-jupiter-engine</ignoredUnusedDeclaredDependency>
+              <!-- maven-dependency-plugin cannot detect the runtime usage of junit-vintage-engine for executing JUnit 4.x tests. -->
+              <ignoredUnusedDeclaredDependency>org.junit.vintage:junit-vintage-engine</ignoredUnusedDeclaredDependency>
+            </ignoredUnusedDeclaredDependencies>
           </configuration>
         </plugin>
       </plugins>