readded google authenticator lines

roles/common/tasks/main.yml

@@ -73,3 +73,7 @@
 - include: ufw.yml tags=ufw
 - include: security.yml tags=security
 - include: ntp.yml tags=ntp
+- include: google_auth.yml tags=google_auth
+  when: ansible_distribution_release != 'trusty'
+- include: google_auth_mod.yml tags=google_auth
+  when: ansible_distribution_release == 'trusty'