Fix typo in 'service ... ensure => running'.

By mistake we had used 'ensure => $running' for the httpd service.
This happened to work on our pilot system, where we set the global
variable $running, but it should not be like that.

Thanks to Kent Engström for making us look for the error.

manifests/init.pp

@@ -93,7 +93,7 @@ class apache::service
 {
     service {
 	'httpd':
-	    enable => true, ensure => $running,
+	    enable => true, ensure => running,
 	    hasstatus => true, hasrestart => true;
     }
 }