Restore builds on JDK 17

Signed-off-by: Cyrille Le Clerc <[email protected]>

Jenkinsfile

@@ -2,7 +2,10 @@
  See the documentation for more options:
  https://github.com/jenkins-infra/pipeline-library/
 */
-buildPlugin(useContainerAgent: false, configurations: [
-  [platform: 'linux', jdk: 21],
-  [platform: 'windows', jdk: 21],
-])
+buildPlugin(
+  forkCount: '1C', // run this number of tests in parallel for faster feedback.  If the number terminates with a 'C', the value will be multiplied by the number of available CPU cores
+  useContainerAgent: false, // Set to `false` if you need to use Docker for containerized tests
+  configurations: [
+    [platform: 'linux', jdk: 21],
+    [platform: 'windows', jdk: 17],
+])