Combined multiple extend statements

Fixes #22

apache/debian_full.sls

       - order: 175
     service:
       - order: 455
+  apache-reload:
+    module:
+      - order: 420
+  apache-restart:
+    module:
+      - order: 425
 
 a2dissite 000-default:
   cmd.run:
     - require:
       - pkg: apache
 
-extend:
-  apache-reload:
-    - order: 420
-
-extend:
-  apache-restart:
-    - order: 425
-
 /etc/apache2/sites-available/default:
   file.absent:
     - order: 230