Storage node now uses local zone variable name.

Puppet 3 scoping changes mean that the exported resources cannot see
the parent scope $swift_zone variable, and must instead use the $zone
variable passed to the device_endpoint defined type.

Change-Id: I9780065c535da713c6d1d4a156f5d688e0ab9c63
Fixes: bug #1190459

manifests/swift/storage-node.pp

@@ -33,15 +33,15 @@ class openstack::swift::storage-node (
 
   define device_endpoint ($swift_local_net_ip, $zone, $weight) {
     @@ring_object_device { "${swift_local_net_ip}:6000/${name}":
-      zone   => $swift_zone,
+      zone   => $zone,
       weight => $weight,
     }
     @@ring_container_device { "${swift_local_net_ip}:6001/${name}":
-      zone   => $swift_zone,
+      zone   => $zone,
       weight => $weight,
     }
     @@ring_account_device { "${swift_local_net_ip}:6002/${name}":
-      zone   => $swift_zone,
+      zone   => $zone,
       weight => $weight,
     }
   }