Installing node modules in Jenkinsfile

Change-Id: I38218bf02ddbbe292b3d751559cc5b3cb99fc35b
diff --git a/Jenkinsfile b/Jenkinsfile
index 6824302..eb324e6 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -15,6 +15,10 @@
 
        dir('orchestration/xos-gui') {
             try {
+
+                stage 'Install Node Modules'
+                sh 'npm install'
+
                 stage 'Check Code Style'
                 sh 'npm run lint'