tox.ini: Force adding localhost to hosts

Author: jayvdb

tox.ini

@@ -30,6 +30,8 @@ deps =
   pytest-instafail
   freezegun
   unittest-expander
+  pyhostman
   https://github.com/mehrdadrad/pubdns/archive/master.zip
 commands =
+  - hostman add 127.0.0.1 localhost
   pytest -vv -rs --instafail --cov=dns_cache --cov-report=term-missing:skip-covered --cov-fail-under={env:COV_FAIL_UNDER} {posargs}