dont touch hostname if not needed

linux/network/hostname.sls

@@ -19,6 +19,7 @@ linux_hostname_file:
 linux_enforce_hostname:
   cmd.wait:
   - name: hostname {{ network.hostname }}
+  - unless: test "$(hostname)" = "{{ network.hostname }}"
 
 {#
 linux_hostname_hosts:
@@ -29,4 +30,4 @@ linux_hostname_hosts:
     - {{ network.hostname }}
 #}
 
-{%- endif %}
+{%- endif %}