[qa] Minor isort fix

nemesifier · nemesifier · commit 3326626f1910 · 2017-06-01T11:56:09.000+02:00
diff --git a/netjsonconfig/backends/openwrt/converters.py b/netjsonconfig/backends/openwrt/converters.py
@@ -1,5 +1,6 @@
 import json
 from copy import deepcopy
+
 from ipaddress import ip_interface, ip_network
 
 from ...utils import get_copy, sorted_dict
