apply a default initial forkCount of 1C to new plugins to speedup the build. (#666)

Co-authored-by: Mark Waite <[email protected]>

Author: jtnord

common-files/Jenkinsfile

@@ -3,6 +3,7 @@
  https://github.com/jenkins-infra/pipeline-library/
 */
 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: true, // Set to `false` if you need to use Docker for containerized tests
   configurations: [
     [platform: 'linux', jdk: 21],