Tests Cleanup: Fix missing calls to setUpClass/tearDownClass.

Continuation/Part 2 of https://gerrit.fd.io/r/#/c/17092/

Change-Id: Id0122d84eaf2c05d29e5be63a594d5e528ee7c9a
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/test/test_acl_plugin_l2l3.py b/test/test_acl_plugin_l2l3.py
index 0c846e7..7f54b05 100644
--- a/test/test_acl_plugin_l2l3.py
+++ b/test/test_acl_plugin_l2l3.py
@@ -104,6 +104,10 @@
         cls.pg0.remote_hosts = cls.loop0.remote_hosts[:half]
         cls.pg1.remote_hosts = cls.loop0.remote_hosts[half:]
 
+    @classmethod
+    def tearDownClass(cls):
+        super(TestACLpluginL2L3, cls).tearDownClass()
+
     def tearDown(self):
         """Run standard test teardown and log ``show l2patch``,
         ``show l2fib verbose``,``show bridge-domain <bd_id> detail``,