Migrate to common_ prefixed vars

tasks/communication.yml

@@ -20,7 +20,7 @@
           }
         - { dest: /etc/postfix/main.cf,
             regexp: "^.?relayhost =",
-            line: "relayhost = {{ relayhost }}"
+            line: "relayhost = {{ common_postfix_relayhost }}"
           }
         - {
             dest: /etc/postfix/main.cf,
@@ -33,11 +33,11 @@
         name: postfix
         state: started
         enabled: yes
-  when: postfix_configure
+  when: common_postfix_configure
 
 - name: Ensure root forwarding address is set
   lineinfile:
     dest: ~/.forward
-    regexp: "{{ root_email }}"
-    line: "{{ root_email }}"
+    regexp: "{{ common_root_email }}"
+    line: "{{ common_root_email }}"
     create: yes