AMBARI-11576. NN start fails when kerberos enabled.(vbrodetskyi)

ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/package/scripts/hdfs_namenode.py

@@ -93,7 +93,7 @@ def namenode(action=None, do_format=True, rolling_restart=False, env=None):
 
     if leave_safe_mode:
       # First check if Namenode is not in 'safemode OFF' (equivalent to safemode ON), if so, then leave it
-      code, out = shell.call(namenode_safe_mode_off)
+      code, out = shell.call(namenode_safe_mode_off, user=params.hdfs_user)
       if code != 0:
         leave_safe_mode_cmd = format("hdfs --config {hadoop_conf_dir} dfsadmin -fs {namenode_address} -safemode leave")
         Execute(leave_safe_mode_cmd,