fix sintax

Jenkinsfile

@@ -39,7 +39,7 @@ pipeline {
                  echo 'Components to deploy:'
                  cat ${DEPLOY_FILE}
                  script {
-                     def length=wc -l ${DEPLOY_FILE}
+                     def length="wc -l ${DEPLOY_FILE}"
                      for (int i = 0; i < length ; ++i) {
                         echo "Component $i+1: " < $DEPLOY_FILE
                      }