bundles/apt: move patchday to metadata reactor, make patchday configurable

bundles/apt/metadata.py

@@ -1,9 +1,4 @@
 defaults = {
-    'cron': {
-        'upgrade-and-reboot': '{minute} 1 * * 5    root    /usr/local/sbin/upgrade-and-reboot'.format(
-            minute=node.magic_number % 30,
-        ),
-    },
     'icinga2_api': {
         'apt': {
             'services': {
@@ -14,3 +9,17 @@ defaults = {
         },
     },
 }
+
+
+@metadata_reactor
+def patchday(metadata):
+    day = metadata.get('apt/unattended_upgrades/day', 5)
+
+    return {
+        'cron': {
+            'upgrade-and-reboot': '{minute} 1 * * {day}    root    /usr/local/sbin/upgrade-and-reboot'.format(
+                minute=node.magic_number % 30,
+                day=day,
+            ),
+        },
+    }