Add a cronjob frequency to pypi_mirror

In order to call bandersnatch cronjob in a more
flexible way, depending on needs, add a setting to
configure the frequency in minutes.

Change-Id: Ia3fb7f5959075f77b6953a47d231aba780e38988

modules/openstack_project/manifests/pypi_mirror.pp

@@ -2,6 +2,7 @@
 #
 class openstack_project::pypi_mirror (
   $vhost_name,
+  $cron_frequency = '*/5',
 ) {
 
   include apache
@@ -60,7 +61,7 @@ class openstack_project::pypi_mirror (
   }
 
   cron { 'bandersnatch':
-    minute      => '*/5',
+    minute      => $cron_frequency,
     command     => 'flock -n /var/run/bandersnatch/mirror.lock timeout -k 2m 30m run-bandersnatch >>/var/log/bandersnatch/mirror.log 2>&1',
     environment => 'PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin',
   }