(SUP-2725) Fix system collection frequency

Prior to this commit, the postgres and vmware classes didn't correctly
set the 'minute' parameter of the defined type for collecting metrics.
It lacks the "0/" prefix, meaning for a default value of 5 we are
performing the collections on the 5th minute, not repeating every 5
minutes.  This commit adds the prefix.

Author: m0dular

manifests/system/postgres.pp

@@ -36,7 +36,7 @@
     metrics_command => $metrics_command,
     tidy_command    => $tidy_command,
     metric_ensure   => $metrics_ensure,
-    minute          => String($collection_frequency),
+    minute          => String("0/${collection_frequency}"),
     notify          => Exec['puppet_metrics_collector_system_daemon_reload'],
   }
 

manifests/system/vmware.pp

@@ -44,7 +44,7 @@
     metrics_command => $metrics_command,
     tidy_command    => $tidy_command,
     metric_ensure   => $metrics_ensure,
-    minute          => String($collection_frequency),
+    minute          => String("0/${collection_frequency}"),
     notify          => Exec['puppet_metrics_collector_system_daemon_reload'],
   }