Specify config clause only if defined in pillar.

Signed-off-by: POTIER Mathieu <mathieu.potier@onzeway.eu>

openssh/auth.sls

 {{ print_name(identifier, key) }}:
   ssh_auth.present:
     {{ print_ssh_auth(identifier, key) }}
+    {%- if 'sshd_config' in pillar and 'AuthorizedKeysFile' in pillar['sshd_config'] %}
     - config: {{ pillar['sshd_config']['AuthorizedKeysFile'] }}
+    {% endif -%}
     - require:
       - service: {{ openssh.service }}
     {%- else %}
 {{ print_name(identifier, key) }}:
   ssh_auth.absent:
     {{ print_ssh_auth(identifier, key) }}
+    {%- if 'sshd_config' in pillar and 'AuthorizedKeysFile' in pillar['sshd_config'] %}
     - config: {{ pillar['sshd_config']['AuthorizedKeysFile'] }}
+    {% endif -%}
     {%- endif -%}
   {%- endfor -%}
 {%- endfor -%}