Now do a pool-refresh on storage update

cloudcontrol/node/hypervisor/lib.py

@@ -437,6 +437,7 @@ class Storage(object):
         return True if self.type in Storage.SHARED_TYPES else False
 
     def update(self):
+        self.lv_storage.poolRefresh()
         self.update_attr()
 
         # update volumes