Update mod proxy id to avoid conflict when using modules te enable this mod

apache/mod_proxy.sls

@@ -3,8 +3,9 @@
 include:
   - apache
 
-a2enmod proxy:
+a2enmod mod_proxy:
   cmd.run:
+    - name a2enmod proxy
     - unless: ls /etc/apache2/mods-enabled/proxy.load
     - order: 225
     - require: