Bug 562908 - Populate the JustJ Git clones with initial content

Use real default pipelineVersion.
diff --git a/releng/org.eclipse.justj.releng/Jenkinsfile b/releng/org.eclipse.justj.releng/Jenkinsfile
index ee8da35..0e76bcc 100644
--- a/releng/org.eclipse.justj.releng/Jenkinsfile
+++ b/releng/org.eclipse.justj.releng/Jenkinsfile
@@ -65,8 +65,7 @@
   parameters {
     string(
       name: 'PIPELINE_VERSION',
-      // defaultValue: "${pipelineVersion}",
-      defaultValue: "0",
+      defaultValue: "${pipelineVersion}",
       description: '''
         If the parameter definitions have changed, this version will be out-dated.
         The script will run but will do nothing other than updating the parameter definitions of the job as a side-effect.