Unmask and start services

Based on feedback from @kushaldas, in some conditions the apt-daily and
apt-daily upgrade would be masked and stopped after install. This should
ensure the services are properly unmasked and started after install.

install_files/ansible-base/roles/common/tasks/unattended_upgrades.yml

@@ -12,3 +12,16 @@
   tags:
     - apt
     - unattended-upgrades
+
+- name: Ensure apt-daily and apt-daily-upgrade services are unmasked, started, and enabled.
+  systemd:
+    name: "{{ item }}"
+    state: started
+    enabled: yes
+    masked: no
+  with_items:
+    - 'apt-daily'
+    - 'apt-daily-timer'
+  tags:
+    - apt
+    - unattended-upgrades