AMBARI-6091. Secure cluster: MapReduce2 service check fails. (jaimin)

ambari-web/app/data/HDP2/secure_mapping.js

@@ -197,6 +197,15 @@ module.exports = [
     "filename": "mapred-site.xml",
     "serviceName": "MAPREDUCE2"
   },
+  {
+    "name": "yarn.timeline-service.enabled",
+    "templateName": [],
+    "foreignKey": null,
+    "value": false,
+    "nonSecureValue": false,
+    "filename": "yarn-site.xml",
+    "serviceName": "YARN"
+  },
   {
     "name": "yarn.resourcemanager.principal",
     "templateName": ["resourcemanager_principal_name", "kerberos_domain"],