Upgrade JUnit to 6.0.1 and Mockito to 5.21.0

* Upgrade JUnit from 5.11.4 to 6.0.1
  Changelog: https://docs.junit.org/5.13.4/release-notes
* Upgrade Mockito from 4.10.0 to 5.21.0
  Changelog: https://github.com/mockito/mockito/releases
* Activate javaagent for tests to avoid JDK warnings

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

Author: holgerfriedrich

pom.xml

@@ -59,10 +59,10 @@
     <oh.java.version>11</oh.java.version>
     <maven.compiler.release>${oh.java.version}</maven.compiler.release>
     <maven.eclipse.version>2.10</maven.eclipse.version>
-    <junit.version>5.11.4</junit.version>
+    <junit.version>6.0.1</junit.version>
     <commons.io.version>2.21.0</commons.io.version>
     <commons.lang3.version>3.20.0</commons.lang3.version>
-    <mockito.version>4.10.0</mockito.version>
+    <mockito.version>5.21.0</mockito.version>
     <maven.resources.version>3.4.0</maven.resources.version>
     <pmd.version>7.18.0</pmd.version>
     <checkstyle.version>10.26.1</checkstyle.version>
@@ -368,6 +368,10 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <version>${maven.surefire.plugin.version}</version>
+        <configuration>
+          <argLine>-javaagent:"${settings.localRepository}/org/mockito/mockito-core/${mockito.version}/mockito-core-${mockito.version}.jar"
+              -Xshare:off</argLine>
+        </configuration>
       </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>