crontab: ensure nova-common is installed before

Because we create a crontab with 'nova' user, we need to ensure it
exists. So we need to make sure Nova is installed (common package).

Otherwise, it can lead to dependencies issues.

Change-Id: I5157e710e4f2e95c4ec9c1f45b414e4a3dbf9228

manifests/cron/archive_deleted_rows.pp

@@ -64,5 +64,6 @@ class nova::cron::archive_deleted_rows (
     monthday    => $monthday,
     month       => $month,
     weekday     => $weekday,
+    require     => Package['nova-common'],
   }
 }

spec/classes/nova_cron_archive_deleted_rows_spec.rb

@@ -15,7 +15,8 @@ describe 'nova::cron::archive_deleted_rows' do
       :hour        => 0,
       :monthday    => '*',
       :month       => '*',
-      :weekday     => '*'
+      :weekday     => '*',
+      :require     => 'Package[nova-common]',
     )
   end
 end