Code enhancements

Jenkinsfile

@@ -81,9 +81,10 @@ pipeline {
       steps {
         script {
           for (String item : service_update.split()) {
+            echo "Updating ${item}"
+            sh "set"
+            sh "docker node ls"
             try{
-               echo "Updating ${item}"
-               sh "docker node ls"
                sh "docker service update ${item} --image ${DOCKER_REGISTRY}/iru/${DOCKER_IMAGE}:${NEWTAG}"
             }
             catch(err){