roles/named: Restart daemon after modifying config

The `named` daemon does not seem to pick up all changes to the
configuration file during a graceful reload. To avoid strange states,
the daemon is now fully restarted after the configuration file is
regenerated.

roles/named/tasks/main.yml

@@ -21,7 +21,7 @@
     owner: root
     group: named
     validate: named-checkconf %s
-  notify: reload named
+  notify: restart named
 
 # TODO: What about other OS/init setups?
 - name: ensure named environment variables are set