More stuff to switch off in hooks

[vext01]

As found by @fsfod:

+    "sudo systemctl stop apt-daily.timer",
+    "sudo systemctl --runtime disable apt-daily.timer", 
+    "sudo systemctl stop apt-daily-upgrade.timer",
+    "sudo systemctl --runtime disable apt-daily-upgrade.timer",
+    
+    "sudo systemctl stop systemd-timesyncd",
+    "sudo systemctl --runtime disable systemd-timesyncd",

[vext01]

None of these services exist in Debian 8, so I will hold off implementing these until such a time (if it exists) as we port to Debian 9.