Pass block_device_info to destroy in revert_resize

Fixes bug #1056285

Passing block_device_info allows the driver to clean up block
device mappings (detaching) properly on the newly resized instance

Change-Id: I2527f883883c741dbf4d20be0ca33dbef6f9f36a
(cherry picked from commit a9fc0c4)

nova/compute/manager.py

@@ -1429,7 +1429,11 @@ def revert_resize(self, context, instance, migration_id,
                                                     teardown=True)
 
             network_info = self._get_instance_nw_info(context, instance)
-            self.driver.destroy(instance, self._legacy_nw_info(network_info))
+            block_device_info = self._get_instance_volume_block_device_info(
+                                context, instance['uuid'])
+
+            self.driver.destroy(instance, self._legacy_nw_info(network_info),
+                                block_device_info)
             self.compute_rpcapi.finish_revert_resize(context, instance,
                     migration_ref['id'], migration_ref['source_compute'],
                     reservations)