Add slow queue to export operation

circle/vm/operations.py

@@ -359,6 +359,7 @@ class ExportDiskOperation(InstanceOperation):
     abortable = True
     required_perms = ('storage.export_disk',)
     accept_states = ('STOPPED',)
+    async_queue = 'localhost.man.slow'
 
     def _operation(self, disk, format='vmdk'):
         disk.export(format)