Fix overwriting dictionary with pillar data.

The dictionary ``sudoers`` is defined twice instead of once,
and then updated with additional values from pillar data. This
prevents looking up map values. This patch updates, instead of
overwrites the dictionary.

sudoers/included.sls

@@ -3,7 +3,7 @@
 include:
   - sudoers
 
-{% set sudoers = pillar.get('sudoers', {}) %}
+{% do sudoers.update(pillar.get('sudoers', {})) %}
 {% set included_files = sudoers.get('included_files', {}) %}
 {% for included_file,spec in included_files.items() -%}
 {{ included_file }}: