fix iteritems python3

salt/files/master.d/f_defaults.conf

 external_auth:
 {%- for auth, users in cfg_master['external_auth']|dictsort %}
   {{ auth }}:
-{%- for user, commands in users.iteritems() %}
+{%- for user, commands in users.items() %}
     {{ user }}:
 {%- for command in commands %}
 {%- if command is mapping %}
-{%- for target, targetcommands in command.iteritems() %}
+{%- for target, targetcommands in command.items() %}
       - {% raw %}'{% endraw %}{{ target }}{% raw %}'{% endraw %}:
 {%- for targetcommand in targetcommands %}
 {%- if targetcommand is mapping %}
-{%- for module, options in targetcommand.iteritems() %}
+{%- for module, options in targetcommand.items() %}
         - {% raw %}'{% endraw %}{{ module }}{% raw %}'{% endraw %}:
-{%- for category, arguments in options.iteritems() %}
+{%- for category, arguments in options.items() %}
             {% raw %}'{% endraw %}{{ category }}{% raw %}'{% endraw %}:
 {%- if arguments is mapping %}
-{%- for key, argument in arguments.iteritems() %}
+{%- for key, argument in arguments.items() %}
               {% raw %}'{% endraw %}{{ key }}{% raw %}'{% endraw %}: {% raw %}'{% endraw %}{{ argument }}{% raw %}'{% endraw %}
 {%- endfor %}
 {%- else %}