Read lines instead of splitting them.

Jenkinsfile

@@ -117,7 +117,6 @@ pipeline {
  */
 def checkout_and_exec(repo_name, actions) {
     def repo_url = "${repo_root}/{$repo_name}"
-    echo "Checkout SHA from reference $commit"
     sh(script: "rm -r ${repo_name} || true", returnStdout: true)?.trim()
     checkout([
             $class                           : 'GitSCM',
@@ -171,7 +170,7 @@ def exec(actions, repo_url, repo_name) {
 @NonCPS
 def parseProjectList(def text) {
     def projects = []
-    "${text}".splitEachLine(',') { project ->
+    text.readLines().each { project ->
         if (!project)
             return
         projects.add(project)