AMBARI-3485. Cannot submit job after customizing hadoop group and enabling security. (swagle)

ambari-agent/src/main/puppet/modules/hdp-hadoop/manifests/params.pp

@@ -183,6 +183,8 @@ class hdp-hadoop::params(
   } else {
     $mapred_local_dir = hdp_default("mapred-site/mapred.local.dir","/tmp/hadoop-mapred/mapred/local")
   }
+
+  $mapred_tt_group = hdp_default("mapred-site/mapreduce.tasktracker.group", "hadoop")
    
   $mapreduce_userlog_retainhours = hdp_default("mapred-site/mapreduce.userlog.retainhours",24)
 

ambari-agent/src/main/puppet/modules/hdp-hadoop/templates/taskcontroller.cfg.erb

@@ -16,5 +16,5 @@
 # * limitations under the License.
 # */
 mapred.local.dir=<%=scope.function_hdp_template_var("mapred_local_dir")%>
-mapreduce.tasktracker.group=<%=scope.function_hdp_default(["::mapred-site/mapreduce.tasktracker.group","hadoop"])%>
+mapreduce.tasktracker.group=<%=scope.function_hdp_template_var("mapred_tt_group")%>
 hadoop.log.dir=<%=scope.function_hdp_template_var("hdfs_log_dir_prefix")%>/<%=scope.function_hdp_template_var("mapred_user")%>