Run handlers before configuring unbound on dna-gw hosts

Unbound doesn't automatically bind to CARP interfaces but network is not
restarted at this stage so force running all handlers.

playbooks/dna-gw.yml

@@ -33,6 +33,9 @@
         - net.inet.ip.forwarding
         - net.inet6.ip6.forwarding
 
+    - name: run handlers to get interfaces configured
+      meta: flush_handlers
+ 
     - name: copy dns zone files
       copy:
         dest: "/var/unbound/db/{{ item }}"