fix volumes management handlers

ccnode/handlers.py

@@ -678,7 +678,7 @@ class NodeHandler(RpcHandler):
     def vol_create(self, pool, name, size):
         size = int(size)
         if hasattr(self._host_handle, 'storage'):
-            pool = self._host_handle.storage().pool_get(pool_name)
+            pool = self._host_handle.storage().pool_get(pool)
             pool.volume_create(name, size)
         else:
             raise NotImplementedError('host handler has no storage support')
@@ -686,7 +686,7 @@ class NodeHandler(RpcHandler):
     @pure
     def vol_delete(self, pool, name, wipe=False):
         if hasattr(self._host_handle, 'storage'):
-            pool = self._host_handle.storage().pool_get(pool_name)
+            pool = self._host_handle.storage().pool_get(pool)
             vol = pool.volume_get(name)
             if wipe:
                 vol.wipe()