AMBARI-4977. Storm security params, should be not hardcoded, but taken

from configs (aonishuk)

ambari-server/src/test/python/stacks/2.1.1/configs/secured.json

@@ -342,7 +342,9 @@
             "zk_pid_dir": "/var/run/zookeeper", 
             "jobhistory_http_primary_name": "HTTP", 
             "namenode_primary_name": "nn", 
-            "tickTime": "2000", 
+            "tickTime": "2000",
+            "storm_keytab" : "/etc/security/keytabs/storm.service.keytab",
+            "storm_principal_name": "storm",
             "storm_user": "storm", 
             "hive_metastore_principal_name": "hive/_HOST", 
             "datanode_keytab": "/etc/security/keytabs/dn.service.keytab",