Add JDK 21 support (#310)

vharseko

23.38.2023 cb69ead94eadce90fd0616b5af263603feee78ba

 opendj-config/pom.xml

@@ -187,8 +187,7 @@
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-surefire-plugin</artifactId>
        <configuration>
          <parallel>methods</parallel>
             <threadCount>1</threadCount>
         <reuseForks>false</reuseForks>
        </configuration>
      </plugin>
      <plugin>