fullstack: Log testrunner again

Commit 546ba377db removed logging of
testrunner, this patch adds it back.

Closes-Bug: 1603363
Change-Id: I6075c903b4d233629224b77425b8fb5e793608ce

neutron/tests/fullstack/base.py

@@ -16,6 +16,7 @@ import os
 
 from oslo_config import cfg
 
+from neutron.tests import base as tests_base
 from neutron.tests.common import helpers
 from neutron.tests.fullstack.resources import client as client_resource
 from neutron.tests import tools
@@ -36,6 +37,9 @@ class BaseFullStackTestCase(testlib_api.MySQLTestCaseMixin,
     def setUp(self, environment):
         super(BaseFullStackTestCase, self).setUp()
 
+        tests_base.setup_test_logging(
+            cfg.CONF, DEFAULT_LOG_DIR, '%s.txt' % self.get_name())
+
         # NOTE(zzzeek): the opportunistic DB fixtures have built for
         # us a per-test (or per-process) database.  Set the URL of this
         # database in CONF as the full stack tests need to actually run a