AMBARI-14644. Ambari creates hdfs user despite ignore_groupsusers_create (aonishuk)

ambari-server/src/main/resources/stacks/HDP/2.0.6/hooks/before-ANY/scripts/shared_initialization.py

@@ -29,8 +29,9 @@ def setup_users():
   Creates users before cluster installation
   """
   import params
+  should_create_users_and_groups = not params.host_sys_prepped and not params.ignore_groupsusers_create
 
-  if not params.host_sys_prepped and not params.ignore_groupsusers_create:
+  if should_create_users_and_groups:
     for group in params.group_list:
       Group(group,
       )
@@ -65,8 +66,10 @@ def setup_users():
 
   if not params.host_sys_prepped:
     if params.has_namenode:
-      create_dfs_cluster_admins()
+      if should_create_users_and_groups:
+        create_dfs_cluster_admins()
     if params.has_tez and params.hdp_stack_version != "" and compare_versions(params.hdp_stack_version, '2.3') >= 0:
+      if should_create_users_and_groups:
         create_tez_am_view_acls()
   else:
     Logger.info('Skipping setting dfs cluster admin and tez view acls as host is sys prepped')