AMBARI-7836. Slider View: Unable to create app, 500 error on POST request (srimanth)

contrib/views/slider/src/main/java/org/apache/ambari/view/slider/SliderAppsViewControllerImpl.java

@@ -1091,8 +1091,10 @@ public class SliderAppsViewControllerImpl implements SliderAppsViewController {
       installArgs.replacePkg = true;
 
       final ActionInstallKeytabArgs keytabArgs = new ActionInstallKeytabArgs();
-      keytabArgs.keytabUri = getUserToRunAsKeytab();
-      keytabArgs.folder = appName;
+      if (securityEnabled) {
+        keytabArgs.keytabUri = getUserToRunAsKeytab();
+        keytabArgs.folder = appName;
+      }
 
       return invokeSliderClientRunnable(new SliderClientContextRunnable<String>() {
         @Override