style: sort imports in compute node modules

gns3server/compute/dynamips/nios/nio.py

@@ -20,10 +20,10 @@ http://github.com/GNS3/dynamips/blob/master/README.hypervisor#L451
 """
 
 import asyncio
-from ..dynamips_error import DynamipsError
-
 import logging
 
+from ..dynamips_error import DynamipsError
+
 log = logging.getLogger(__name__)