Fix periodic log cleanup

'*.log' does not match filename postfixed with date, as most of them
are, e.g. dib.devstack-fedora21-dib.log.2016-01-11_14. Add an
additional filter to match that case.

The cleanup was added in Iee55717bc5fbf88d739a4124f62f76d193cf3b75.

Change-Id: I2a796ee1e9a9cb7f7ea83312227311c9515f09d1

manifests/init.pp

@@ -311,7 +311,7 @@ class nodepool (
       user        => 'nodepool',
       hour        => '1',
       minute      => '0',
-      command     => "find ${image_log_document_root} -name '*.log' -mtime +7 -execdir rm {} \\;",
+      command     => "find ${image_log_document_root} \( -name '*.log' -o -name '*.log.*' \) -mtime +7 -execdir rm {} \\;",
       environment => 'PATH=/usr/bin:/bin:/usr/sbin:/sbin',
     }
   }