Move readFile to a dedicated stage.

Jenkinsfile

@@ -71,16 +71,17 @@ if (verbose) {
 }
 
 def jobs = [:]
-def previous_report_file = ''
-if (resume_from) {
-    previous_report_file = "${agent_root_folder}/build_jobs.${resume_from}.csv"
+def previous_report_content = ''
+def previous_report_file = "${agent_root_folder}/build_jobs.${resume_from}.csv"
+
+/*if (resume_from) {
     echo "Previous report file: ${previous_report_file}"
     jobs = parseJobs(previous_report_file)
     if (verbose) {
         for (job in jobs)
             println job
     }
-}
+}*/
 
 
 pipeline {
@@ -134,6 +135,15 @@ pipeline {
 
     //see https://jenkins.io/doc/book/pipeline/syntax/#stages
     stages {
+        stage('resume') {
+            steps {
+               sh 'cat ${PREVIOUS_JOB_REPORT}'
+               content = readFile ${PREVIOUS_JOB_REPORT}
+               jobs = parseJobs(content)
+               for (job in jobs)
+                   println job
+            }
+        }
         stage('initialize') {
             steps {
                 sh '''
@@ -269,10 +279,9 @@ def buildComponents(args, maven_settings_file, maven_local_repo_path,  jobs) {
  Loads the jobs from the given report.
 */
 @NonCPS
-def parseJobs(job_file) {
+def parseJobs(content) {
     def jobs = [:]
     //try {
-        def content = readFile file:job_file
         println content
         content.splitEachLine(',') {  columns ->
             if (columns[0].startsWith('#') || columns[0].startsWith('JobName'))