slapos_pdm: Run Software Installation clean up only once a day

master/bt5/slapos_pdm/PathTemplateItem/portal_alarms/slapos_pdm_destroy_software_installation_with_archived_software_release.xml

@@ -31,18 +31,22 @@
         <item>
             <key> <string>periodicity_hour</string> </key>
             <value>
-              <tuple/>
+              <tuple>
+                <int>20</int>
+              </tuple>
             </value>
         </item>
         <item>
             <key> <string>periodicity_hour_frequency</string> </key>
-            <value> <int>2</int> </value>
+            <value>
+              <none/>
+            </value>
         </item>
         <item>
             <key> <string>periodicity_minute</string> </key>
             <value>
               <tuple>
-                <int>0</int>
+                <int>8</int>
               </tuple>
             </value>
         </item>