roles: The apt cache_valid_time implies update_cache

See: https://docs.ansible.com/ansible/latest/modules/apt_module.html

roles/common/tasks/tarsnap.yml

@@ -17,7 +17,7 @@
     add_tarsnap_apt_repository is changed
 
 - name: Install tarsnap
-  apt: pkg=tarsnap update_cache=yes
+  apt: pkg=tarsnap cache_valid_time=3600
 
 - name: Copy tarsnaprc
   copy: src=tarsnaprc dest=/root/.tarsnaprc owner=root group=root mode=0600